CNN Health

More moms-to-be in the United States are using marijuana, especially in their first trimester, according to a study published Tuesday in the medical journal JAMA.

While childhood obesity remains a serious problem in the United States, an "encouraging" new study finds that obesity rates among low-income preschoolers have declined.

On Wednesday, the US Environmental Protection Agency under President Trump finalized its rollback of President Obama's signature climate policy -- the Clean Power Plan, which aimed to reduce coal-fired power plant emissions. The administration will replace the plan with the Affordable Clean Energy Rule.

Planned Parenthood has broken ground on a new state-of-the-art woman's clinic in Alabama despite a looming near-total ban on abortions.

Whether patients have problems after surgery could depend on their surgeons' behavior, a new study suggests.

Each summer, as Lauren Rutkowski and her husband Joel await the arrival of energized, sun-kissed children for their seven-week camp, the couple surveys the canoes and paddleboards, the arts and crafts, the food menus -- and every camper's vaccination records.

People in high-income countries have the lowest confidence in vaccines, with about 20% of those in Europe either disagreeing or being unsure of whether vaccines are safe, according to a new global survey.

Tests by an online pharmacy turned up another cancer-causing compound in heart medications, and these drugs haven't been recalled.

Measles is not the souvenir you want to bring back from your once-in-a-lifetime trip to Europe this summer, but there's an increasing likelihood that could happen if your vaccinations are not up to date.

Suicide rates among young people have continued to soar in recent years -- so much so that the rate among 15- to 24-year-olds climbed in 2017 to its highest point since 2000, new research has found.

Climate change may lead to unlikely illnesses in unexpected places, new research suggests: In the past two years, five cases of Vibrio vulnificus, a flesh-eating bacterial infection spread by handling or eating contaminated seafood, have been tied to Delaware Bay, where water temperatures have been on the rise in recent years, according to a study.

Scores of parents and locals gathered outside a hospital in the eastern Indian state of Bihar on Tuesday to protest the death of more than 100 children over the past three weeks.

Citing an "ecosystem of addiction," Nevada Attorney General Aaron D. Ford announced Monday he is expanding a complaint against manufacturers, distributors, pharmacies, and individuals the state says are responsible for the opioid addiction crisis in Nevada.

When Dr. Koji Ebersole laid eyes on the boy whose face was impaled on a 10-inch knife, the neurosurgeon thought, "here we go again."

For many female students when they get their period, this is the reality: Lacking access to a pad or a tampon, they go home.

Worldwide, people ingest an average of 5 grams of plastic every week, the equivalent of a credit card, a new study suggests.

The brand recalled its Lightly Salted Barbecue Flavored Potato Chips in 24 states because they may contain a milk allergen.

Patients who receive a diagnosis of coronary heart disease are at higher risk for cognitive decline later on, a new study shows.

Your social media could reveal a lot more about you than you think.

Cosmetic products such as perfume, nail polish and shampoo help us feel and look good. But in the wrong hands -- especially those of the very young -- these products can be harmful, or even deadly. More than 64,000 kids younger than 5 years old had a cosmetic-related injury between 2002 and 2016, according to estimates in a study published Monday in the journal Clinical Pediatrics.