Studies the causes and biological processes leading to abnormal development and birth defects, and appropriate measures for prevention.

A non-profit organization offering a forum for clinical embryology, listing conferences, membership details, contacts for officers and international representatives, and link to professional societies.

The professional organisation for developmental biologists in the UK.

OTIS provides fact sheets on a number of different hazards, and links to medical providers in the U.S. and Canada who provide free counseling for prospective parents and medical providers.