Clomifene Citrate is a selective estrogen receptor modulator (SERM) primarily used to treat infertility in women by inducing ovulation. It works by binding to estrogen receptors in the hypothalamus and pituitary gland, blocking negative feedback from endogenous estrogen, which stimulates the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) to promote ovarian follicle development and egg release. This triphenylethylene compound, available as brand names like Clomid or Serophene, exhibits both estrogenic and anti-estrogenic properties depending on the tissue, making it effective for conditions like anovulatory or oligo-ovulatory cycles, including polycystic ovarian syndrome (PCOS). Off-label applications include male hypogonadism to boost testosterone production and certain headache syndromes.