In 1974, scientists found that the maintenance of normal menstrual function was related to a critical level of 22 % body fat. (eatstopeat.org)
Evidence suggests that women need a certain level of leptin to maintain normal menstrual function (9, 10). (mediatrendings.com)
Prior to bone injury, symptoms can be vague and nonspecific such as decreased energy, strength, endurance and cold intolerance; however, abnormal menstrual function should raise concerns in these athletes. (sportstarsmag.com)