The female reproductive system includes organs that produce hormones like estrogen and progesterone. Ovaries release one mature egg each month during ovulation. Fallopian tubes transport the egg from ...

Wondering about the weirdest animals in the world? We've listed the Top 31 here — including the axolotl, aye-aye, blobfish, ...

Believe it or not, but ducks have a reputation for the unexpected: bizarre and intricate mating anatomy. According to ...

A large-scale investigation of carnivoran brain diversity, providing a unified description of folding patterns, their relationship to behaviour and ecology, and the foundation for future ...

Following a 14-day mission aboard China’s space station, a female mouse has successfully delivered a litter of nine healthy pups back on Earth. The birth marks a major victory for space biology. As ...

Researchers at the University of Hawaiʻi at Mānoa have developed new mouse models to study a key male fertility gene, ...

Scientists are making inroads in understanding one of the central mysteries of human reproduction: Why do women’s eggs deteriorate as they age? The broad strokes have been well-known - the ticking of ...

Many animals do something that still surprises researchers: females often mate with more than one male. This ...

Expert says the Y chromosome will disappear in about 125,000 years. LONDON, April 28, 2008— -- Imagine a world without men: Lauren Bacall but no Bogie, Hillary Clinton but no Bill, no Starsky or ...