part of part of has part has part in taxon develops from develops from capable of capable of luteal cell progesterone secretion Vertebrata <vertebrates> Myxinidae Homo sapiens endocrine system ovary ovarian follicle endocrine gland corpus luteum http://upload.wikimedia.org/wikipedia/commons/5/57/Folliclesinovary.jpg SCTID:257943001 UMLS:C0010092 NCIT:C26465 CALOHA:TS-0181 EMAPA:29886 luteal gland A transient endocrine gland that develops from the postovulatory or atretic follicles and secretes progesterone; it is thought to be related to egg retention[PMID]. maintains the endometrium in mammals[WP]. A corpus luteum is known in hagfish (100), Squalus (101), and salamander (100) but not lamprey (102). There are no data for Branchiostoma and Ciona, and given that they are multiple spawners, there is no a priori reason to conclude that they lack a corpus luteum MA:0002834 GAID:369 ovarian corpus luteum Wikipedia:Corpus_luteum corpus luteum of ovary BTO:0000292 MESH:D003338 UBERON:0002512 corpora lutea FMA:18619 female reproductive organ mesoderm-derived structure female reproductive gland