LONDON — Since in many species, sperm is males’ only contribution to reproduction, biologists have long puzzled about why evolutionary selection, known for its ruthless efficiency, allows them to ...

Since in many species, sperm is males' only contribution to reproduction, biologists have long puzzled about why evolutionary selection, known for its ruthless efficiency, allows them to exist. Now ...

Timothée Chalamet has ignited debate after expressing his belief that reproduction is the core purpose of human existence. In ...

All vertebrate and invertebrate animals have an innate immune system, but adaptive immunity is thought to be a uniquely vertebrate feature 3. Underlying adaptive immunity are variable, clonally ...

The world’s first baby conceived through an AI-assisted IVF process marks a historic leap in fertility science. Using robotic ...

Women who wait until 35 to start trying for a family were warned today (Thursday 17 June) that if they did not conceive spontaneously they could not depend on assisted reproduction to make up fully ...