Term Name:	primitive urogenital sinus
Synonyms:	fetal UGS, sinus urogenitalis, UGS, urogenital sinus
Definition:	the ventral part of the cloaca remaining after septation of the rectum, which further develops into part of the bladder, part of the prostatic part of the male urethra and the urethra and vestibule in females
Ontology:	Cell Ontology [UBERON:0000164]