Editing Maternal effect (section)

===In birds===
In birds, mothers may pass down hormones in their eggs that affect an offspring's growth and behavior. Experiments in [[domestic canaries]] have shown that eggs that contain more yolk androgens develop into chicks that display more social dominance. Similar variation in yolk androgen levels has been seen in bird species like the [[American coot#Maternal effects|American coot]], though the mechanism of effect has yet to be established.<ref>{{cite journal | vauthors = Reed WL, Clark ME | title = Beyond maternal effects in birds: responses of the embryo to the environment | journal = Integrative and Comparative Biology | volume = 51 | issue = 1 | pages = 73–80 | date = July 2011 | pmid = 21624931 | doi = 10.1093/icb/icr032 | doi-access = free }}</ref>