Levels of Urinary Luteinizing hormone During The Menstrual Cycle of A Golden Monkey Rhinopithecus roxellanae

Urinary luteinizing hormone (LH) was measured during two menstrual cycles of one adult female golden monkey using an improved in vitro bioassay method.Midcycle peaks in LH (100.0±9.0 miu/ml) were six times higher than the follicular phase and four times higher than the luteal phase.This suggests that the cycles were ovulatory.The peaks appear in the middle of the menstrual cycle.The pattern of LH secretion in the golden monkey closely resembles those in the rhesus monkey and human females.