The median duration of hospitalization differed significantly between women with without polycystic ovary syndrome before (median 11 days, IQR 7-14, vs. median 9 days, IQR 7-12, respectively; p = 0.044) as well as between the types of ovulation induction (hCG: median 10 days, IQR 8-14, vs. GnRH agonists: median 9 days, IQR 7-12; p = 0.047). Here, GNRH1 is linked to polycystic ovary syndrome.