In flowering plants, the transition from cross-fertilization (outcrossing) to self-fertilization has evolved repeatedly across species. This shift is often accompanied by a well-known set of traits ...

Sperm selection in the female reproductive tract (FRT) is sophisticated. Only about 1,000 sperm out of millions in an ejaculate reach the fallopian tube and thus have a chance of fertilizing an oocyte ...

In vitro fertilization (IVF) in mammals encompasses a series of coordinated steps that replicate the natural union of gametes outside the body. Following ovarian stimulation and oocyte retrieval, ...

The first babies conceived in space were cockroaches. When they were born on Earth, scientists said the offspring were bigger, grew faster, ran faster, and took on a dark-red color. Credit: Ian Moore ...