In 1977, the US Food and Drug Administration (FDA) imposed a ban on women of childbearing age being included in early drug trials – even if they used contraception or had vasectomised partners. This ...

Most people who misuse opioids take the drugs to relieve pain, but data suggest that men are more likely to misuse and overdose on opioids than women, even though they suffer less chronic pain.

The opioid epidemic has claimed more than half a million lives in the U.S. since 1999, about three-quarters of them men, according to the National Institutes of Health. Although men's disproportionate ...

The Science of Siblings is a new series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We'll be sharing these stories ...

Most people assume that our genes determine the characteristics that make males and females distinct from each other: sex organs, secondary sex characteristics, personality, behavior, and even ...

Hormones are the body’s chemical messengers. They act on various tissues and organs in the body to change their behavior. For example, the hormone prolactin stimulates the production of breastmilk.