The menstrual cycle is regulated by a complex interplay of hormones. The primary hormones involved are oestrogen, progesterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH). During the follicular phase, FSH stimulates the growth of follicles in the ovaries, which produce oestrogen. As oestrogen levels rise, it triggers the release of LH, which causes ovulation. After ovulation, the ruptured follicle transforms into the corpus luteum, which produces progesterone. Progesterone prepares the uterine lining for implantation and inhibits FSH and LH production. If fertilisation does not occur, the corpus luteum degenerates, progesterone levels decrease, and the uterine lining sheds during menstruation. Irregularities in hormonal levels can cause menstrual disorders, such as polycystic ovary syndrome (PCOS) and endometriosis, which can affect fertility and overall health. To learn more about the roles of menstrual cycle hormones, visit outlookhealth.org website. Visit- https://outlookhealth.org/health-conditions-specific-to-womens-health/