With a new imaging technique, UC San Francisco scientists discover an ecosystem that determines how eggs mature and ovaries ...

Nature is full of evolutionary selflessness. From deep-sea octopuses to certain marsupials, there are animals and insects that reproduce and then die, as their lives can be cut short because they ...

University of Sheffield and University College London researchers have made the first successful detection of estrogen, ...

New research from the Max Planck Institute for Evolutionary Anthropology and the University of Turku reveals that female ...

A new study has shown the ovary’s tissues and cells play a bigger role than previously thought in how fertility wanes.

What are some animals that give birth to huge numbers of offspring at once?” (Watch a female sea urchin produce millions of eggs.) The mola, or ocean sunfish, looks like an animal cracker someone bit ...

For decades, studying menstruation has posed a problem even the most sophisticated lab equipment couldn’t solve: most lab ...

Just before sunset, as baseball-sized tarantulas cross the road at Colorado’s Southern Plains Land Trust, two biologists quietly exit their car to scoop up a few of these eight-legged pedestrians.