From day one of its very first menstrual cycle, an ovary works hard to develop follicles that produce and release the very ...

These insects probably have the largest sperm-to-body-size ratio. A male fruit fly’s sperm is nearly 40 times larger than ...

A pregnant naked mole rat can shut down reproduction across her entire colony using a single chemical compound, and ...

I am not a health person,” said Tolo, 30, sitting in her Los Angeles apartment. “I’m not a wellness person.” But she is the ...

Amnesty expresses regret over report naming JK Rowling centre as ‘anti-rights’ - The charity has removed the report which ...

For decades, one idea has shaped discussions about human evolution and birth: humans endure unusually difficult childbirth ...