Editing Embryology (section)

== Medical embryology ==
Medical embryology is used widely to detect abnormalities before birth. 2-5% of babies are born with an observable abnormality and medical embryology explores the different ways and stages that these abnormalities appear in.<ref name=":0" /> Genetically derived abnormalities are referred to as [[malformation]]s. When there are multiple malformations, this is considered a [[syndrome]]. When abnormalities appear due to outside contributors, these are disruptions. The outside contributors causing disruptions are known as [[teratogen]]s. Common teratogens are alcohol, retinoic acid,<ref>{{Cite journal|last1=Soprano|first1=Dianne Robert|last2=Soprano|first2=Kenneth J.|date=1995-07-01|title=Retinoids as Teratogens|journal=Annual Review of Nutrition|volume=15|issue=1|pages=111–132|doi=10.1146/annurev.nu.15.070195.000551|pmid=8527214|issn=0199-9885}}</ref> ionizing radiation or hyperthermic stress.