Among the birds of the world, it is usually the males who have the brightest feathers and the females who are the most drab, ...

The male jacana, in contrast, is a wonderfully devoted father. He keeps the eggs warm, safe, and dry by tucking them under his wings. If the nest starts to sink, he can also use this clever method ...

FIFA studies link between women's menstrual cycles and ACL tears. Explore insights into gender-specific sports health ...

A red-capped manakin will moonwalk better than Michael Jackson in a lek of others when it wants to attract a female mate.

A new study on superb starlings, colorful birds native to the African savanna, has revealed that these animals form long-term ...

So, is Imane Khelif male or female? Biologically, she might have traits typically associated with males. But socially, legally, and personally — she’s a woman.

The experiments show that changes in iron levels can lead male mammalian embryos to develop female sex characteristics, regardless of their genetics.

That could help alter the male-to-female ratio of baby turtles considerably. Allen, for one, finds the new developments reassuring. Sea turtles may be more resilient than once thought.

In mice, a lack of maternal iron impairs an iron-dependent enzyme that activates the male sex-determining gene, causing some XY embryos to develop ovaries.

Male mice can grow female organs — if their mothers lack iron Iron deficiency disrupts a sex-determining pathway in mice — plus, research highlighting the role that small-scale fishers play in ...

He hopes it will help other male survivors to speak out. Photo / Rafaella Melo Dove Hawke’s Bay chief executive Stewart Eadie has broken his silence about the sexual abuse he endured as a child.

Are there certain foods or sex positions that will increase your chances of having a boy? Learn more about suggested methods for choosing the sex of your baby, and what may actually work.