The function of ENSG00000137819 (PAQR5, progestin and adipoQ receptor family member 5) is as follows. Plasma membrane progesterone (P4) receptor coupled to G proteins (PubMed:23763432). Seems to act through a G(i) mediated pathway (PubMed:23763432). May be involved in oocyte maturation (PubMed:12601167). {ECO:0000269|PubMed:12601167, ECO:0000303|PubMed:23763432}.