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Could a CA bill on tortillas improve maternal health?

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Monday, April 15, 2024

A premature baby in incubator. Photo via iStock California is struggling to provide maternal health for its residents. But as one proposal aims to prevent birth defects, another has received hateful pushback that’s been condemned by both political parties. As CalMatters health reporter Ana B. Ibarra writes, Assemblymember Joaquin Arambula has introduced a bill that would require corn masa flour makers to add 0.7 milligrams of folic acid per pound of flour. Though federal law requires other grain products, such as cereals, breads and pasta, be fortified with folic acid, corn masa flour is not included. The corn flour is a key ingredient used in many classic Latino foods. Arambula, a Fresno Democrat and physician, to CalMatters: “Food is the best way that we can get folic acid into our communities before they’re pregnant. Oftentimes the prenatal vitamins that we give to pregnant people are too late.”  Research has shown that folic acid, which can be found in prenatal and women’s multi-vitamins, promotes healthy cell growth, and can prevent birth defects when taken before and during the early weeks of pregnancy. Since 1998, when the U.S. Food and Drug Administration handed down the requirement, the proportion of babies born with neural tube defects dropped by 35%. But between 2017 and 2019, only about 28% of Latinas reported taking folic acid the month before becoming pregnant, compared to 46% of white women. Women on Medi-Cal, the state’s health insurance program for low-income families, are also less likely to take folic acid before pregnancy compared to women on private insurance.  To learn more about the proposal, read Ana’s story. Another bill related to maternal health, Assembly Bill 2319, was the subject of a racist letter sent to members of the Health Committee, according to lawmakers. The measure would require healthcare providers to undergo training for implicit bias, and for the training to include “recognition of intersecting identities.”  The bill’s co-author, Assemblymember Lori Wilson, said the letter was “vile and hateful.” Assembly Republicans also said the letter had no place in legislative debate: “While we may not always agree on policy, we are united to strongly condemn racism and the evil ideology behind this letter.” Wilson, a Suisun City Democrat who is chairperson of the Legislative Black Caucus, vowed to carry on with the measure. The proposals by Arumbula and Wilson follow state data showing that in 2020 California saw a ten-year high of pregnancy-related deaths. Black expectant mothers are particularly vulnerable: They are three times more likely to die of pregnancy-related complications than others. It’s a point raised by former state Senate leader Toni Atkins in a social media post last week. Meanwhile, maternity wards across the state are closing, creating “maternity care deserts,” and California midwives treating Medi-Cal patients struggle to keep their businesses afloat. A February report from the state auditor also found that state health departments failed to track the effectiveness of a perinatal care program for Medi-Cal patients. Digital Democracy: CalMatters has launched Digital Democracy, a project using the latest technologies to help Californians understand their state government and create more accountability for politicians. The website introduces each of the state’s 120 legislators and explains this year’s policy agenda. In our unprecedented database, you can instantly find any word uttered in a public hearing, every vote cast, every bill introduced and every dollar donated. For more details, see our about and methodology pages and read more from our engagement team. Other Stories You Should Know Builders can challenge impact fees New housing construction in a neighbourhood in Elk Grove on July 8, 2022. Photo by Rahul Lal, CalMatters From CalMatters housing reporter Ben Christopher:It’s about to get more difficult for local governments to slap construction projects with certain fees — and a bit easier for developers to sue governments when they do.  That’s thanks to a unanimous ruling the U.S. Supreme Court handed down Friday. As many court watchers expected, the justices sided with George Sheetz, a septuagenarian retiree who sued El Dorado County over a $23,420 building fee. Sheetz’s lawyers argued that the county should have had to prove that this five-digit fee matched the cost that his manufactured home actually would inflict on local roads and highways. That requirement was established in a four-decade-old court ruling also out of California. El Dorado County, with the backing of both the Gov. Gavin Newsom and President Joe Biden administrations, countered that such a high bar is only required of one-off fees levied by regulators, not fees scheduled for all developments and established by elected bodies, like the county board of supervisors. In its 9-0 ruling, the Supreme Court said that “there is no basis for affording property rights less protection in the hands of legislators than administrators.” A few possible consequences of the ruling: Cities and counties now have to show that impact fees are connected to and “roughly proportionate” to the fiscal impact of a given development. That could have the unintended consequence of slowing down permitting.  Developers may now have a powerful new legal tool to challenge fees that they think are too high. And they are high here. As of 2015, the average impact fee on a single family home in California was more than four times the national average. But it’s too soon to say exactly how all of this will shake out. That’s because the court stopped short of saying exactly how far governments have to go to justify their fees — or whether El Dorado County already cleared that hurdle in this case. Those questions were left to lower courts. State cracks down on water Armona’s new $9 million well and treatment facility to remove arsenic in its water supply. Photo by Larry Valenzuela, CalMatters/CatchLight Local The State Water Resources Control Board is poised to penalize Kings County groundwater agencies for failing to manage overpumping in the region’s water supply — a move that would set a new precedent. As CalMatters water reporter Rachel Becker explains, the board on Tuesday is expected to decide whether to put county agencies on probation for unsuccessfully restricting farmers’ overdrafting of the water supply from the Tulare Lake underground basin. If the board decides to crack down, it will be the first time the state imposes penalties under a landmark 2014 law that requires agencies to achieve groundwater sustainability by 2040.The board’s decision could also signal how the state will approach five other overpumped San Joaquin Valley basins that may face probation as well. Overpumping in Kings County has caused household and community water wells to dry up and land to sink, which endangers canals, aqueducts and flood-controlling levees. And because wells must reach deeper into the ground to extract water, contaminants such as arsenic are released and cause water contamination levels to rise. Putting Kings County agencies on probation could mean imposing state fees totaling as much as $10 million a year, according to a CalMatters analysis. It could also lead to state regulators eventually managing the region’s groundwater. This has small farmers in the region concerned that they’ll be forced out of business due to the state’s steep fees. The basin provides drinking and irrigation water for 146,000 residents and supports a multibillion-dollar agricultural industry. For more on this issue, read Rachel’s story. California’s water crisis, explained: CalMatters has a detailed look at how California might increase its water supply, and a dashboard tracking the state’s water situation. CalMatters Commentary Ideas festival: CalMatters is hosting its first one, in Sacramento on June 5-6. It will include a discussion on broadband access and a session with Zócalo Public Square on California’s next big idea. Featured speakers include Julián Castro, CEO of the Latino Community Foundation, and Barbara McQuade, a former U.S. attorney and MSNBC legal analyst. Find out more from our engagement team and buy tickets here. Other things worth your time: Some stories may require a subscription to read. CA granted federal disaster relief for historic February storms // Los Angeles Times  Ballot measure for America’s highest wage could be victim of past wins // Politico Prop. 22 gains liberal support as case heads to state high court // San Francisco Chronicle PG&E customers were billed for a TV promo campaign // The Sacramento Bee Google blocks some CA news as fight over online journalism bill escalates // Politico Bill to mandate ‘science of reading’ in CA classrooms dies // EdSource CA abortions increased after Roe vs. Wade was overturned // Los Angeles Times The first high-speed rail trains are closer to coming to CA // San Francisco Chronicle Environmental concerns raised by rocket flights // The San Diego Union-Tribune SF jails lock down after alleged assaults on staff // Los Angeles Times SF background check startup Checkr cutting 260 jobs // San Francisco Examiner SF $2B Central Subway has lots of leaks, few riders // The San Francisco Standard Kern County activist faces 18 felony counts over alleged threats // Los Angeles Times Former Windsor mayor’s accusers speak out on no charges // San Francisco Chronicle

California is struggling to provide maternal health for its residents. But as one proposal aims to prevent birth defects, another has received hateful pushback that’s been condemned by both political parties. As CalMatters health reporter Ana B. Ibarra writes, Assemblymember Joaquin Arambula has introduced a bill that would require corn masa flour makers to add […]

A premature baby in incubator. Photo via iStock
A premature baby in incubator. Photo via iStock
A premature baby in incubator. Photo via iStock

California is struggling to provide maternal health for its residents. But as one proposal aims to prevent birth defects, another has received hateful pushback that’s been condemned by both political parties.

As CalMatters health reporter Ana B. Ibarra writes, Assemblymember Joaquin Arambula has introduced a bill that would require corn masa flour makers to add 0.7 milligrams of folic acid per pound of flour. Though federal law requires other grain products, such as cereals, breads and pasta, be fortified with folic acid, corn masa flour is not included. The corn flour is a key ingredient used in many classic Latino foods.

  • Arambula, a Fresno Democrat and physician, to CalMatters: “Food is the best way that we can get folic acid into our communities before they’re pregnant. Oftentimes the prenatal vitamins that we give to pregnant people are too late.” 

Research has shown that folic acid, which can be found in prenatal and women’s multi-vitamins, promotes healthy cell growth, and can prevent birth defects when taken before and during the early weeks of pregnancy. Since 1998, when the U.S. Food and Drug Administration handed down the requirement, the proportion of babies born with neural tube defects dropped by 35%.

But between 2017 and 2019, only about 28% of Latinas reported taking folic acid the month before becoming pregnant, compared to 46% of white women. Women on Medi-Cal, the state’s health insurance program for low-income families, are also less likely to take folic acid before pregnancy compared to women on private insurance. 

To learn more about the proposal, read Ana’s story.

Another bill related to maternal health, Assembly Bill 2319, was the subject of a racist letter sent to members of the Health Committee, according to lawmakers.

The measure would require healthcare providers to undergo training for implicit bias, and for the training to include “recognition of intersecting identities.” 

The bill’s co-author, Assemblymember Lori Wilson, said the letter was “vile and hateful.”

Assembly Republicans also said the letter had no place in legislative debate: “While we may not always agree on policy, we are united to strongly condemn racism and the evil ideology behind this letter.”

Wilson, a Suisun City Democrat who is chairperson of the Legislative Black Caucus, vowed to carry on with the measure.

The proposals by Arumbula and Wilson follow state data showing that in 2020 California saw a ten-year high of pregnancy-related deaths. Black expectant mothers are particularly vulnerable: They are three times more likely to die of pregnancy-related complications than others. It’s a point raised by former state Senate leader Toni Atkins in a social media post last week.

Meanwhile, maternity wards across the state are closing, creating “maternity care deserts,” and California midwives treating Medi-Cal patients struggle to keep their businesses afloat. A February report from the state auditor also found that state health departments failed to track the effectiveness of a perinatal care program for Medi-Cal patients.


Digital Democracy: CalMatters has launched Digital Democracy, a project using the latest technologies to help Californians understand their state government and create more accountability for politicians. The website introduces each of the state’s 120 legislators and explains this year’s policy agenda. In our unprecedented database, you can instantly find any word uttered in a public hearing, every vote cast, every bill introduced and every dollar donated. For more details, see our about and methodology pages and read more from our engagement team.


Other Stories You Should Know


Builders can challenge impact fees

New housing construction in a neighbourhood in Elk Grove on July 8, 2022. Photo by Rahul Lal, CalMatters

From CalMatters housing reporter Ben Christopher:

It’s about to get more difficult for local governments to slap construction projects with certain fees — and a bit easier for developers to sue governments when they do. 

That’s thanks to a unanimous ruling the U.S. Supreme Court handed down Friday.

As many court watchers expected, the justices sided with George Sheetz, a septuagenarian retiree who sued El Dorado County over a $23,420 building fee.

Sheetz’s lawyers argued that the county should have had to prove that this five-digit fee matched the cost that his manufactured home actually would inflict on local roads and highways. That requirement was established in a four-decade-old court ruling also out of California.

El Dorado County, with the backing of both the Gov. Gavin Newsom and President Joe Biden administrations, countered that such a high bar is only required of one-off fees levied by regulators, not fees scheduled for all developments and established by elected bodies, like the county board of supervisors.

In its 9-0 ruling, the Supreme Court said that “there is no basis for affording property rights less protection in the hands of legislators than administrators.”

A few possible consequences of the ruling:

  • Cities and counties now have to show that impact fees are connected to and “roughly proportionate” to the fiscal impact of a given development. That could have the unintended consequence of slowing down permitting. 
  • Developers may now have a powerful new legal tool to challenge fees that they think are too high.

And they are high here. As of 2015, the average impact fee on a single family home in California was more than four times the national average.

But it’s too soon to say exactly how all of this will shake out. That’s because the court stopped short of saying exactly how far governments have to go to justify their fees — or whether El Dorado County already cleared that hurdle in this case. Those questions were left to lower courts.

State cracks down on water

The water treatment facility in Armona on April 4, 2024. Armona, a small unincorporated community home to farmworkers in Kings County, had substantial arsenic contamination until a new $9 million well was installed more than 1,200 feet deep. Photo by Larry Valenzuela, CalMatters/CatchLight Local
Armona’s new $9 million well and treatment facility to remove arsenic in its water supply. Photo by Larry Valenzuela, CalMatters/CatchLight Local

The State Water Resources Control Board is poised to penalize Kings County groundwater agencies for failing to manage overpumping in the region’s water supply — a move that would set a new precedent.

As CalMatters water reporter Rachel Becker explains, the board on Tuesday is expected to decide whether to put county agencies on probation for unsuccessfully restricting farmers’ overdrafting of the water supply from the Tulare Lake underground basin. If the board decides to crack down, it will be the first time the state imposes penalties under a landmark 2014 law that requires agencies to achieve groundwater sustainability by 2040.

The board’s decision could also signal how the state will approach five other overpumped San Joaquin Valley basins that may face probation as well.

Overpumping in Kings County has caused household and community water wells to dry up and land to sink, which endangers canals, aqueducts and flood-controlling levees. And because wells must reach deeper into the ground to extract water, contaminants such as arsenic are released and cause water contamination levels to rise.

Putting Kings County agencies on probation could mean imposing state fees totaling as much as $10 million a year, according to a CalMatters analysis. It could also lead to state regulators eventually managing the region’s groundwater.

This has small farmers in the region concerned that they’ll be forced out of business due to the state’s steep fees. The basin provides drinking and irrigation water for 146,000 residents and supports a multibillion-dollar agricultural industry.

For more on this issue, read Rachel’s story.

California’s water crisis, explained: CalMatters has a detailed look at how California might increase its water supply, and a dashboard tracking the state’s water situation.


CalMatters Commentary

Ideas festival: CalMatters is hosting its first one, in Sacramento on June 5-6. It will include a discussion on broadband access and a session with Zócalo Public Square on California’s next big idea. Featured speakers include Julián Castro, CEO of the Latino Community Foundation, and Barbara McQuade, a former U.S. attorney and MSNBC legal analyst. Find out more from our engagement team and buy tickets here.


Other things worth your time:

Some stories may require a subscription to read.


CA granted federal disaster relief for historic February storms // Los Angeles Times 

Ballot measure for America’s highest wage could be victim of past wins // Politico

Prop. 22 gains liberal support as case heads to state high court // San Francisco Chronicle

PG&E customers were billed for a TV promo campaign // The Sacramento Bee

Google blocks some CA news as fight over online journalism bill escalates // Politico

Bill to mandate ‘science of reading’ in CA classrooms dies // EdSource

CA abortions increased after Roe vs. Wade was overturned // Los Angeles Times

The first high-speed rail trains are closer to coming to CA // San Francisco Chronicle

Environmental concerns raised by rocket flights // The San Diego Union-Tribune

SF jails lock down after alleged assaults on staff // Los Angeles Times

SF background check startup Checkr cutting 260 jobs // San Francisco Examiner

SF $2B Central Subway has lots of leaks, few riders // The San Francisco Standard

Kern County activist faces 18 felony counts over alleged threats // Los Angeles Times

Former Windsor mayor’s accusers speak out on no charges // San Francisco Chronicle

Read the full story here.
Photos courtesy of

New Study Links Wildfire Smoke to Premature Births

By I. Edwards HealthDay ReporterWEDNESDAY, Nov. 5, 2025 (HealthDay News) — Wildfire smoke may do more than harm the lungs.New research shows it...

WEDNESDAY, Nov. 5, 2025 (HealthDay News) — Wildfire smoke may do more than harm the lungs.New research shows it could also raise the risk of premature birth.A large study from the University of Washington found that pregnant people exposed to wildfire smoke were more likely to deliver early.The findings, published Nov. 3 in The Lancet Planetary Health, are based on more than 20,000 births across the United States between 2006 and 2020.About 10% of babies in the U.S. are born early, which can lead to lifelong health problems. While air pollution has already been linked to preterm birth, this is one of the biggest studies so far to look specifically at wildfire smoke as a contributor, researchers said.“Preventing preterm birth really pays off with lasting benefits for future health,” said lead author Allison Sherris, a postdoctoral researcher at the University of Washington in Seattle.“It’s also something of a mystery. We don’t always understand why babies are born preterm, but we know that air pollution contributes to preterm births, and it makes sense that wildfire smoke would as well," she added in a news release. "This study underscores that wildfire smoke is inseparable from maternal and infant health.”Researchers measured how often pregnant people were exposed to wildfire-related fine particle pollution, known as PM2.5, and how much they were exposed.The risk of preterm birth was higher when exposure happened in the second trimester, especially around week 21. Later in pregnancy, the biggest risk came from high levels of wildfire smoke, above 10 micrograms per cubic meter. The strongest link was seen in the Western U.S., where wildfire smoke has become more frequent and intense. “The second trimester is a period of pregnancy with the richest and most intense growth of the placenta, which itself is such an important part of fetal health, growth and development,” said co-author Dr. Catherine Karr, a professor of pediatrics and environmental health."So it may be that the wildfire smoke particles are really interfering with placental health," Karr added in a news release. "Some of them are so tiny that after inhalation they can actually get into the bloodstream and get delivered directly into the placenta or fetus.”Researchers say more work is needed to understand exactly how wildfire smoke affects pregnancy, but the evidence is now strong enough to take action for pregnant people."There’s an opportunity to work with clinicians to provide tools for pregnant people to protect themselves during smoke events," Sherris said. "Public health agencies’ messaging about wildfire smoke could also be tailored to pregnant people and highlight them as a vulnerable group."SOURCE: University of Washington, news release, Nov. 3, 2025Copyright © 2025 HealthDay. All rights reserved.

Light Pollution Harming Heart Health, Study Says

By Dennis Thompson HealthDay ReporterMONDAY, Nov. 3, 2025 (HealthDay News) — The bright lights of the big city might seem dazzling, but they can be...

By Dennis Thompson HealthDay ReporterMONDAY, Nov. 3, 2025 (HealthDay News) — The bright lights of the big city might seem dazzling, but they can be hard on your heart health, a new study says.People exposed to high levels of artificial light have an increasingly higher risk of heart disease, researchers are scheduled to report at a Nov. 10 meeting of the American Heart Association in New Orleans.Higher exposure to artificial light at night was associated with a 35% increased risk of heart disease within five years, and a 22% increased risk over 10 years, researchers found.“We found a nearly linear relationship between nighttime light and heart disease: the more night-light exposure, the higher the risk,” senior researcher Dr. Shady Abohashem, head of PET/CT cardiac imaging trials at Massachusetts General Hospital in Boston, said in a news release.For the new study, researchers analyzed the health of 466 adults with an average age of 55 who’d undergone a PET or CT scan at Massachusetts General Hospital between 2005 and 2008.The team compared the participants’ health and brain scans to their exposure to artificial light, based on their home address.Results showed that higher levels of artificial light caused brain stress activity and blood vessel inflammation.“Even modest increases in night-time light were linked with higher brain and artery stress,” Abohashem said. “When the brain perceives stress, it activates signals that can trigger an immune response and inflame the blood vessels. Over time, this process can contribute to hardening of the arteries and increase the risk of heart attack and stroke.”Over a decade, 17% of the people developed a major heart condition. Their light exposure was associated with risk of heart disease, even after accounting for other risk factors.Heart risks were even higher among people who lived in areas with high traffic noise, lower neighborhood income or other environmental factors that can add to stress, researchers said.To counter these ill effects, “people can limit indoor nighttime light, keeping bedrooms dark and avoiding screens such as TVs and personal electronic devices before bed,” Abohashem said.Cities also might improve folks’ health by reducing unnecessary outdoor lighting, shielding street lamps, or using motion-sensitive lights, researchers said.“These findings are novel and add to the evidence suggesting that reducing exposure to excessive artificial light at night is a public health concern,” Julio Fernandez-Mendoza, an American Heart Association spokesman, said in a news release.“We know too much exposure to artificial light at night can harm your health, particularly increasing the risk of heart disease. However, we did not know how this harm happened,” said Fernandez-Mendoza, director of behavioral sleep medicine at Pennsylvania State University College of Medicine, who was not involved in the study.“This study has investigated one of several possible causes, which is how our brains respond to stress,” he explained. “This response seems to play a big role in linking artificial light at night to heart disease.”Researchers next plan to see whether reducing nighttime light exposure might improve people’s heart health.Findings presented at medical meetings should be considered preliminary until published in a peer-reviewed journal.SOURCE: American Heart Association, news release, Nov. 3, 2025Copyright © 2025 HealthDay. All rights reserved.

Turns Out, There Are 5 Sleep Styles — And Each Affects Your Brain Differently

By I. Edwards HealthDay ReporterTHURSDAY, Oct. 9, 2025 (HealthDay News) — A new study suggests there’s more to sleep than how long you snooze each...

THURSDAY, Oct. 9, 2025 (HealthDay News) — A new study suggests there’s more to sleep than how long you snooze each night. Your overall sleep pattern could shape your mood, brain function and even long-term health.Researchers from Concordia University in Montreal identified five distinct sleep profiles that may help explain why some people feel well-rested while others struggle with fatigue, poor focus or emotional ups and downs.The findings, published Oct. 7 in PLOS Biology, show that these “sleep-biopsychosocial profiles” reflect a mix of biological, mental and environmental factors — from stress and emotions to bedroom comfort — that all affect how well you sleep.“People should treat their sleep seriously,” study co-author Valeria Kebets, a manager at Concordia’s Applied AI Institute, told NBC News. “It affects everything in their daily functioning.”The researchers identified five sleep profiles:1. Poor sleep and mental healthPeople in this group reported the worst sleep quality and higher levels of stress, fear and anger. They also had a greater risk of anxiety and depression.These individuals had poor mental health or attention issues but said their sleep felt fine, suggesting “sleep misperception,” or being unaware of underlying sleep problems, researchers said.3. Sleep aids and sociabilityThis group used sleep aids, but also reported strong social support and fewer feelings of rejection. However, they showed lower emotional awareness and weaker memory.4. Sleep duration and cognitionPeople sleeping fewer than six to seven hours a night scored lower on tests measuring problem-solving and emotional processing. They also showed higher aggression and irritability.5. Sleep disturbances and mental healthThose with issues like frequent waking, pain or temperature imbalance had higher rates of anxiety, substance use and poor cognitive performance.The study analyzed data from 770 healthy adults aged 22 to 36, using MRI scans and questionnaires about sleep, lifestyle and mood.Experts say the profiles could help doctors tailor sleep treatments in the future.“We really need to consider multiple sleep profiles in our research and clinic — the value of a multidimensional approach to data,” Dr. Phyllis Zee, director of the Center for Circadian and Sleep Medicine at Northwestern University, who was not involved in the study, told NBC News.Sleep experts also say the research reinforces the importance of good rest for both mental and physical health.“Sleep is a more complex issue than just how much time you spend in bed,” Dr. Rafael Pelayo, a sleep medicine specialist at Stanford University, said in the NBC News report. “If I can improve your sleep, it has downwind effects on your overall health — not just your mental health, but your physical health.”SOURCE: NBC News, Oct. 8, 2025Copyright © 2025 HealthDay. All rights reserved.

Wildfire Smoke Might Damage Male Fertility

By Dennis Thompson HealthDay ReporterTHURSDAY, Oct. 9, 2025 (HealthDay News) — Wildfire smoke could be damaging men’s fertility, according to a new...

By Dennis Thompson HealthDay ReporterTHURSDAY, Oct. 9, 2025 (HealthDay News) — Wildfire smoke could be damaging men’s fertility, according to a new study.Key measures of sperm quality appeared to drop among dozens of men participating in fertility treatments, researchers recently reported in the journal Fertility and Sterility.“These results reinforce growing evidence that environmental exposures — specifically wildfire smoke — can affect reproductive health,” said senior researcher Dr. Tristan Nicholson, an assistant professor of urology in the University of Washington School of Medicine in Seattle.“As we see more frequent and intense wildfire events, understanding how smoke exposure impacts reproductive health is critical,” she added in a news release.For the study, researchers analyzed semen samples from 84 men taken as part of intrauterine insemination procedures in the Seattle area between 2018 and 2022.Major wildfire smoke events hit Seattle in 2018, 2020 and 2022, researchers noted. The team compared the men’s sperm quality during and between these events.“This study takes advantage of our institution’s location in the Puget Sound region, where wildfire smoke events create distinct pre- and post-exposure periods in a natural experiment to examine how a sudden, temporary decline in air quality influences semen parameters,” researchers wrote.Results showed consistent declines in sperm concentration, total sperm count and sperm movement during wildfire smoke exposures.Wildfire smoke contains particle pollution that can invade a person’s organs through their lungs and bloodstream, researchers said.This exposure has previously been linked to lung cancer, respiratory disease, heart attack, stroke and mental impairment, but its effect on male fertility has not been well-studied, researchers said.Overall, the pregnancy rate among the men’s partners was 11%, and the live birth rate 9% — both at the low end of the average range, researchers noted.However, the team added that the study was not designed to fully evaluate the direct impact of wildfire smoke on reproductive outcomes.Researchers next plan to see what happens after wildfire smoke has dented a man’s fertility.“We are very interested in how and when sperm counts recover after wildfire smoke exposure,” Nicholson said. “Currently we are conducting a prospective pilot study of men in the Seattle area to evaluate how wildfire smoke affects sperm quality.”SOURCE: University of Washington, news release, Oct. 1, 2025Copyright © 2025 HealthDay. All rights reserved.

AirPods Pro 3 review: better battery, better noise cancelling, better earbuds

Top Apple buds get upgraded sound, improved fit, live translation and built-in heart rate sensors, but are still unrepairableApple’s extremely popular AirPods Pro Bluetooth earbuds are back for their third generation with a better fit, longer battery life, built-in heart rate sensors and more effective noise cancelling, and look set to be just as ubiquitous as their predecessors.It has been three years since the last model, but the earbuds still come only in white and you really have to squint at the details to spot the difference from the previous two generations. Continue reading...

Apple’s extremely popular AirPods Pro Bluetooth earbuds are back for their third generation with a better fit, longer battery life, built-in heart rate sensors and more effective noise cancelling, and look set to be just as ubiquitous as their predecessors.The Guardian’s journalism is independent. We will earn a commission if you buy something through an affiliate link. Learn more.It has been three years since the last model, but the earbuds still come only in white and you really have to squint at the details to spot the difference from the previous two generations.The AirPods Pro 3 cost £219 (€249/$249/A$429), making them £30 cheaper in the UK than when their predecessors launched, and sit above the AirPods 4, which cost £169 with noise cancelling for those who don’t like silicone earbud tips.The shape of the earbuds has been tweaked, changing slightly the way you put them in and making them more comfortable than their predecessors for extended listening sessions of three hours or more. Five sizes of tips are included in the box, but if you didn’t get on with silicone earbuds before these won’t make a difference.The stalks are the same length as before, but the shape of the earbud has been changed to better align the tip with your ear canal. Photograph: Samuel Gibbs/The GuardianMost of the features are fairly standard for modern earbuds. Squeeze the stalks for playback controls, swipe for volume or take them out to pause the music. They support the same new features rolled out to Apple’s older earbuds, including the ability to use them as a shutter remote for the camera app and for live translation with the Translate app on the iPhone. The latter is limited to English, French, German, Portuguese and Spanish for now and isn’t available in the EU, but it works surprisingly well for casual conversations.The biggest problem is that the other person will have to rely on reading or hearing your translated speech from your iPhone. I can see it being most useful with announcements or audio guides – the kind you get on transport or in museums where you need only to translate language one way.The most interesting added hardware feature is heart rate monitoring via sensors on the side of the earbuds, similar to Apple’s Powerbeats Pro 2 fitness buds. They can be used with more than 50 workouts started in the Fitness app or a handful of third-party apps on the iPhone and proved to be roughly in line with readings from a Garmin Forerunner 970 or an Apple Watch during walks and runs. The earbuds are water-resistant to IP57 standards, which makes them much more robust against rain and sweat than before.The battery life has been increased by a third to at least eight hours of playback with noise cancelling for each charge, which is very competitive with some of the best rivals and long enough for most listening sessions.The compact flip-top case provides two full charges for a total playback time of 24 hours – six hours short of the previous generation, but five minutes in the case is enough for an hour of listening time. Photograph: Samuel Gibbs/The GuardianSpecifications Connectivity: Bluetooth 5.3, SBC, AAC, H2 chip, UWB Battery life: eight hours ANC playback (24 hours with case) Water resistance: IP57 (buds and case) Earbud dimensions: 30.9 x 19.2 x 27.0mm Earbud weight: 5.6g each Charging case dimensions: 47.2 x 62.2 x 21.8mm Charging case weight: 44g Case charging: USB-C, Qi wireless/MagSafe, Apple Watch Bigger sound and impressive noise cancellingThe silicone earbuds are infused with foam in the tips that expands slightly for a better seal for music and noise cancelling. Photograph: Samuel Gibbs/The GuardianThe sound of the third-generation AirPods Pro takes a great listen and makes it bigger. They have a wider soundscape that makes big tracks sound more expansive, while still maintaining strong but nicely controlled bass. They are detailed, well-balanced and do justice to different genres of music, with plenty of power and punch where needed. As with Apple’s other headphones, they sometimes sound a little too clinical, lacking a bit of warmth or rawness in some tracks, and they can’t quite hit the very deepest of notes for skull-rattling bass. However, few earbuds sound better at this price and size.Apple’s implementation of spatial audio for surround sound for movies remains best in class, adding to the immersion with compatible devices and services, even if spatial audio music remains a mixed bag.The AirPods Pro are the best combination of earbuds and compact case that you can easily fit in a pocket. Photograph: Samuel Gibbs/The GuardianThe improved noise cancelling is the best upgrade. Apple says it is twice as effective as the already good AirPods Pro 2, which sounds about right. In side-by-side comparisons, the AirPods Pro 3 handle street noise, including cars, horns and engines, almost as well as the class-leading Sony WH-1000XM6, which is thoroughly impressive given they are large over-ear headphones, not little earbuds.They also do a great job of dampening the troublesome higher tones such as keyboard clicks and speech, making the commute and office work more bearable.Apple’s class-leading transparency mode is just as good on the new earbuds, sounding natural as if you weren’t actually wearing the earbuds. It makes using them as hearing aids or out on the street with some dampening of sudden loud sounds very good indeed.Call quality is first-rate, and my voice sounded clear and natural in quiet or noisy environments with only a hint of road noise from some loud streets audible on the call.SustainabilityThe case charges via USB-C, MagSafe, Qi or Apple Watch charger, and has a new feature to limit charging of the earbuds to prolong their battery health. Photograph: Samuel Gibbs/The GuardianApple does not provide an expected lifespan for the batteries. Those in similar devices typically maintain at least 80% of their original capacity for 500 full charge cycles. The earbuds are not repairable, but Apple offers a battery service for £49 per earbud or case and offers replacements for those lost or damaged costing from £79 an item. The repair specialists iFixit rated the earbuds zero out of 10 for repairability.The AirPods and case contain 40% recycled material by weight including aluminium, cobalt, copper, gold, lithium, plastic, rare earth elements and tin. Apple offers trade-in and free recycling schemes and breaks down the environmental impact of the earbuds in its report.PriceThe AirPods Pro 3 cost £219 (€249/$249/A$429).For comparison, the AirPods 4 start at £119, the Beats Powerbeats Pro 2 cost £250, the Sennheiser Momentum TW4 cost £199, the Google Pixel Buds Pro 2 cost £219, the Sony WF-1000XM5 cost £219 and the Bose QuietComfort Ultra earbuds cost £300.VerdictThe AirPods Pro 3 take what was great about the ubiquitous second-generation models and improves almost everything.Longer battery life and a better, more comfortable fit for extended listening sessions are very welcome, as is the bigger, wider sound. Proper water resistance and built-in heart rate monitoring makes them useful for workouts, particularly those such as powerlifting that make wearing a watch difficult. The live translation feature worked better than expected, but has limitations that make it less useful for real-life conversations.The best bit is very effective noise cancelling that rivals some of the greatest over-ear headphones, but in a tiny set of earbuds that are much easier to carry around.Audiophiles will find they sound a little too clinical. While they work with any Bluetooth device, including Android phones, PCs and games consoles, they require an iPhone, iPad or Mac for full functionality. But the biggest letdown remains repairability, which remains a problem for most true wireless earbuds and loses them a star. Pros: very effective noise cancelling, great sound, best-in-class transparency, water resistance, built-in HR monitoring, great controls, advanced features with Apple devices including spatial audio, very comfortable, excellent case, top class call quality. Cons: extremely difficult to repair, expensive, no hi-res audio support, lack features when connected to Android/Windows, look the same as predecessors, only available in white. The AirPods Pro 3 are some of the very best earbuds you can buy, particularly if you use an iPhone. Photograph: Samuel Gibbs/The Guardian

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