PLOD1 and Oligomenorrhea: Although these studies [14,16] define a critical EA threshold of 30 kcal/kg LBM for the initiation of reduced LH pulsatility, few investigators have examined whether an EA of 30 kcal/kg LBM discriminates normal ovarian function from either subtle (luteal phase defects or anovulation) or severe (oligomenorrhea or amenorrhea) menstrual disturbances in exercising women.