Clomid is definitely an oral drugs that can feel used to trigger ovulation. It works by blocking estrogen receptors at the hypothalamus, and that is an important "hormonal control location" for the body. When this happens, the hypothalamus is stimulated to release follicle stimulating hormone (FSH), and luteinizing hormone (LH). These tend to be the obviously developing ovarian stimulants, which prompt ovulation in a typical cycle.