Human newborns arrive remarkably underdeveloped. The reason lies in a deep evolutionary trade-off between big brains, bipedalism and the limits of motherhood.

MEXICO CITY — When she walked into an IVF clinic in June, Alin Quintana knew it would be the last time she would try to conceive a child. She had prepared herself spiritually and mentally for the ...

A Chinese scientist horrified the world in 2018 when he revealed he had secretly engineered the birth of the world's first gene-edited babies. His work was reviled as reckless and unethical because, ...

Radiation and microgravity are two of the greatest hazards to astronauts’ reproductive health. “Space radiation can damage ...

In 1970, a woman in Mexico might have expected to have seven children, on average. By 2014, that figure had fallen to around two. As of 2023, it was just 1.6. That means that the population is no ...