OXTR and polycystic ovary syndrome: Hormone receptors were differentially expressed in PCOS oocytes compared with non-PCOS oocytes at the mutational stage, including anti-Müllerian hormone receptor, type II (AMHR2), LHCGR, oxytocin receptor (OXTR) and K (lysine) acetyltransferase 2B (KAT2B) (Fig. 5C).