title: Studies on the appearance and nature of a maturation-inducing factor in the cytoplasm of amphibian oocytes exposed to progesterone.
mesh_terms: D000557:Ambystoma / Q000196:embryology; D000663:Amphibians / Q000196:embryology*; D000818:Animals; D001001:Anura; D002455:Cell Division; D003593:Cytoplasm / Q000378:metabolism*; D005260:Female; D006133:Growth Substances / Q000096:biosynthesis*; D010063:Ovum / Q000254:growth & development*; D011374:Progesterone / Q000494:pharmacology*; D011894:Rana pipiens / Q000196:embryology; D013997:Time Factors; D014981:Xenopus / Q000196:embryology
chemical_list: D006133:Growth Substances; D011374:Progesterone