Oral contraceptive pills (birth control pills) contain hormones like FSH and LH either in. combination of estrogen or progesterone only, that primarily prevent the release of eggs or inhibit ovulation. The LH promotes ovulation, formation of corpus luteum and secretion of progesterone from it. Fusion of male and female gametes, ie, sper and ovum forming zygote is called fertilization. It may be external (outside the body of female), or internal (inside the body of female). Reproduction is the formation of new similar living organisms by the grown up individuals of 2 species or race.