Role Of Lh In Ovulation

Thus normal follicular growth is the result of complementary action of fsh and lh. Luteinizing hormone lh is produced and released in the anterior pituitary gland. Called the lh surge this event causes one large dominant follicle to bulge from the surface of the ovary in preparation for ovulation.

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Although exogenous fsh is the main regulator of follicular growth in stimulated cycles lh plays a key role in promoting steroidogenesis and follicle development.

Role of lh in ovulation. Toledo et al 1996 the specific role of lh in folliculogenesis and oocyte maturation is less clear. While normal ovulation is impossible without lh weiss et al 1992. This hormone is considered a gonadotrophic hormone because of its role in controlling the function of ovaries in females and testes in males which are known as the gonads. Thecal cells tc express lh receptors constitutionally and lh stimulates androgen substrate production by the tc from fetal life until after the menopause adashi 1996.

Luteinizing hormone lh plays a key role in gonadal function. This hormone is known as a gonadotropin and it affects the sex organs in both men and women. This hormone plays a key role in the reproductive system of both males and females. Around day 14 of the cycle a surge in luteinising hormone levels causes the ovarian follicle to tear and release a mature oocyte egg from the ovary a process called ovulation.

For the remainder of the cycle weeks three to four the remnants of the ovarian follicle form a corpus luteum. Luteinizing hormone lh is an important hormone both men and women produce. Luteinizing hormone or lh and follicle stimulating hormone or fsh trigger monthly release of an egg from a follicle and stimulate the ruptured follicle to produce the sex hormones estrogen and progesterone. Watch the animation to learn more about these hormones and ovulation.

As a woman s menstrual cycle approaches mid cycle usually the 13th or 14th day high estrogen levels in her blood stimulate a sudden and large increase in the pituitary s output of lh. Latronico et al 1996. Lh in synergy with follicle stimulating hormone fsh stimulates follicular growth and ovulation. Luteinizing hormone lh also known as lutropin and sometimes lutrophin is a hormone produced by gonadotropic cells in the anterior pituitary gland in females an acute rise of lh lh surge triggers ovulation and development of the corpus luteum in males where lh had also been called interstitial cell stimulating hormone icsh it stimulates leydig cell production of testosterone.

A luteinizing hormone lh test is a blood or urine test that measures the levels of lh in a person s blood.