Melatonin is a hormone primarily released by the pineal gland at night, and has long been associated with control of the sleep–wake cycle.
Prasterone, also known as dehydroepiandrosterone (DHEA) is a major C19 steroid produced by the adrenal cortex. Dehydroepiandrosterone (DHEA) is an intermediate in the conversion of cholesterol to androgens and estrogens.
Etonogestrel is a steroidal progestin used as hormonal contraceptives. It is the biologically active metabolite of desogestrel used in the contraceptive ring in combination with ethinyl estradiol, and alone in a subdermal implant.