Sperm donated in the UK is being exported to other countries and can be used to create large numbers of children across the world, violating a strict 10-family limit that applies in the UK, experts ...

IVF fertilization takes place in vitro i.e. outside the body. Fertilization takes place in an incubated Petri dish. The resulting embryo is transferred back to the uterus on Day 3 at the 6-8 cell ...

Researchers at Northwestern knew fertilization triggered millions of zinc particles, but they’d never actually seen the process until now. Update, Dec. 19, 2014: This post has been updated to specify ...

On the co-existence of Irco forms of flowers in the same species or genus,—a more conspicuous one adaptred to cross-ferlilisalion by insects, and a less conspicuous one adapted to self-fertilisation.