A female Asian elephant calf was born Feb. 2 to mother Nhi Linh and father Spike at the Smithsonian’s National Zoo and ...

University of Alberta researchers have, for the first time, captured a much better view of what may be contributing to ...

As the county pioneers two days of monthly leave, employees share stories of stigma, relief, and a hope for wider change amid ...

The Surinam toad has an unusual trick for reproduction: instead of leaving their spawn in water to develop, once the eggs are laid, the male presses them into the female's back.

Groundhogs emerge from their burrows around Feb.4. This fits the folklore of Groundhog Day, but predicting the weather is not ...

These “walking sharks” can lay eggs without spending extra energy, rewriting what scientists thought they knew about reproduction.

Early in development, many animals pick a team—male or female—based on their genetics, and, with time, acquire the ...

Women in India were told they couldn't be paid for their eggs. The result: a black market for eggs from women in need of ...

New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

Ducks evolved reverse spirals and sperm storage that give females surprising control, challenging long-held assumptions about ...

The female orgasm leads to muscle contraction, increased heart rate, brain changes, and the release of hormones. On average, it takes about 14 minutes of stimulation for a woman to reach orgasm. Most ...

Cervical mucus becomes clear and stretchy during ovulation. Checking cervical mucus can predict the best time to try for a baby. Ovulation symptoms include increased libido and breast tenderness.