PLOD1 and polycystic ovary syndrome: Furthermore, one study reported that LH was significantly higher across the follicular and luteal phases in women with anovulatory PCOS than in controls, while LH was significantly higher in women with PCOS who had sporadic ovulation compared to non-PCOS women, but only during the follicular phase and not in the luteal phase (Jarrett et al., 2020).