Endocrine Abstracts

Through its circadian pattern of melatonin (MT) secretion, the pineal gland helps to keep the internal physiology of animals in synchrony with the day-night cycle and with the annually changing seasons.Currently, however, the influence of MT on the human reproductive axis appears to be marginal and the available evidence supporting its physiological role is largely circumstantial; there is no clear consensus whether MT levels change during the menstrual ...