Cat Oyler’s heart defect wasn’t discovered until she was 45. (Photo by Brett Wills) Back in her office after the New Year’s holiday, Cat Oyler, then 45, struggled to catch her breath. She felt like a heavy weight was sitting on her chest. She could take only a fraction of a normal breath, unable to…

Kathryn Doornbos (left), executive director of Redemptive Cycles, with Jeh Jeh Pruit (center) and Jeniese Hosey during Bike to Work Day 2018 in Birmingham, Alabama. Kathryn Doornbos needed a way to unwind from the tedious work of studying the outer membrane proteins of the bacterium that causes tuberculosis. So one evening she hopped on her…

(Simon Fuller Imagery, Getty Images) Pregnant women receive a lot of instructions to ensure the healthiest possible baby: what to eat and drink, what to avoid, which vitamins to take, which activities to avoid and more. But what about breathing? Researchers have long been concerned about air pollution’s effects on pregnancy, with possible consequences ranging…

(Dougal Waters/DigitalVision, Getty Images) Hot summer weather impacts some people more than others, and pregnant women are among those most likely to become overheated. Barely more than a week into summer and as heat waves blanket Europe and the eastern United States, what are the risks for expectant mothers? “It’s not unexpected to see pregnant…

(microgen, iStock/Getty Images Plus) Infants and young children with low levels of vitamin D may be at greater risk of high blood pressure later in childhood, a new study says. Researchers followed 775 children from birth to age 18 at the Boston Medical Center. Most lived in a low-income urban area, and about two-thirds were…