The most important component of the oral contraceptive pills is

Use of contraceptive pills is a widespread form of birth control. Contraceptive pills contain oestrogen and progesterone. The production of the pituitary hormones FSH and LH in the normal sexual cycle of a female is shut down by these hormones. In the absence of FSH, the ovarian follicles do not ripen and ovulation does not occur in the absence of LH .