Clomid is an oral medication used to stimulate ovulation in individuals with irregular or absent cycles, such as those with PCOS or unexplained infertility. It works by blocking estrogen receptors in the brain, prompting the release of more follicle-stimulating hormone (FSH) and luteinizing hormone (LH). This helps the ovaries produce and release eggs. Clomid is typically taken for five days early in the cycle and is often combined with ultrasound monitoring and timed intercourse or IUI.