Polycystic ovary syndrome (PCOS) is the most common ovarian endocrine disease in women of reproductive age (Conway et al., 2014), with an incidence among premenopausal women of up to 20% when applying Rotterdam criteria (Yildiz et al., 2012). Oligo-ovulation is the most important and classic clinical manifestation of PCOS (Escobar-Morreale, 2018), and the resulting infertility is the major cause of anovulatory infertility (Balen and Michelmore, 2002), which affects many infertile women of reproductive age.