title: Differential effects of hormones on precocious yolk sac retraction in chick embryos following administration by a new technique.
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000494:pharmacology*; D000818:Animals; D002642:Chick Embryo / Q000254:growth & development*; D002645:Chickens; D005260:Female; D005938:Glucocorticoids / Q000494:pharmacology; D008297:Male; D010902:Pituitary Gland / Q000502:physiology* / Q000637:transplantation; D013890:Thiourea / Q000494:pharmacology*; D013963:Thyroid Hormones / Q000494:pharmacology; D014184:Transplantation, Homologous; D014817:Vitelline Membrane / Q000187:drug effects / Q000502:physiology*
chemical_list: D005938:Glucocorticoids; D013963:Thyroid Hormones; D000324:Adrenocorticotropic Hormone; D013890:Thiourea