Plasma membrane progesterone (P4) receptor coupled to G proteins (PubMed:23161870, PubMed:23763432). Seems to act through a G(s) mediated pathway (PubMed:23161870). May be involved in regulating rapid P4 signaling in the nervous system (PubMed:23763432). Also binds dehydroepiandrosterone (DHEA), pregnanolone, pregnenolone and allopregnanolone (PubMed:23161870). {ECO:0000269|PubMed:23161870, ECO:0000303|PubMed:23763432}. This is the function of Ensembl gene identifier ENSG00000188582 (PAQR9, progestin and adipoQ receptor family member 9).