Human biology is not black and white. Although newborns are typically categorized as male or female at birth based on visible ...

New research published in Biology of Sex Differences has found that sex differences in brain structure are already present at birth and remain relatively stable during early postnatal development. The ...

Watch the Video Click here to watch on YouTube Chameleons are celebrated for their incredible ability to change color at will ...

It seems the Trump administration is arguing that people like me are neither male nor female but simply ‘disordered,’” writes ...

It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

Although the egg is resistant to slow, evenly distributed pressure, it is vulnerable to sharp, concussive pressure. It has to ...

Mosquito antennae are complex structures that transduce sound into ... such as frog calls or the sound of female wingbeats. In the future, the antennae of what we think of as pests could inspire ...

AP About half of the newborn birds are female — with hens beginning to lay their own eggs at the age of six months. New York state had sanitized 15,000 eggs from Crescent Duck Farm at an off ...

US egg major Cal-Maine Foods has reached an agreement ... The change would lead to a new governance structure at Cal-Maine and a potential diversification of the family’s financial holdings.

A bird flu outbreak affecting eggs hits differently in a city where prices and availability fluctuate from block to block. By Dionne Searcey and Ashley Southall The inquiries start casually.

A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.