Melatonin yog ib yam tshuaj uas tso tawm los ntawm cov qog pineal ntawm lub hlwb hauv cov tsiaj thiab tib neeg.Vim tias nws tuaj yeem ua rau cov hlwb uas tsim lub teeb melanin, yog li lub npe melatonin, tseem hu ua pineal hormone, melatonin, melatonin.Tom qab melatonin synthesized thiab khaws cia rau hauv lub cev pineal, sympathetic paj excitation innervates pineal hlwb kom tso melatonin.Lub secretion ntawm melatonin muaj ib tug pom tseeb circadian atherosclerosis, uas yog suppressed thaum nruab hnub thiab nquag thaum hmo ntuj.Melatonin tuaj yeem cuam tshuam cov hypothalamic-pituitary-gonadal axis, txo cov ntsiab lus ntawm gonadotropin tso cov tshuaj hormones, gonadotropin, luteinizing hormone thiab follicle stimulating hormone, thiab tuaj yeem ua ncaj qha rau gonads kom txo cov ntsiab lus ntawm androgen, estrogen thiab progesterone.