HORMONAL CONTROL OF GAMETOGENESIS��SPERMATOGENESIS�OOGENESIS

HORMONAL CONTROL OF GAMETOGENESIS (SPERMATOGENESIS�OOGENESIS)

1. HORMONAL CONTROL OF GAMETOGENESIS SPERMATOGENESIS OOGENESIS Dr. R. K. Upadhyay PGT, Biology KV, 39 GTC. Varanasi cantt

2. GAMETOGENESIS SPERMATOGENESIS (TESTES) OOGENESIS (OVARY)

3. HORMONAL CONTROL HYPOTHALAMUS ANTRIOR PITUITARY TESTES / OVARY

4. HYPOTHALAMUS

5. ANTERIOR PITUITARY FSH (FOLLICULR STIMULATING HARMONE) LH (LUTEINIZING HORMONE) BOTH ARE RELEASES IN BLOOD AND REACH TO THE TESTES AND OVARY

6. MALE HORMONE FSH- Acts on Sertoli cells to begin facilitating spermatogenesis. LH acts on interstitial cells of Leydig  to make and release testosterone .

7. Testosterone Secondary sexual characteristics Stimulates spermatogenesis.

8. Negative feedback INHIBIN HORMONE Rising levels of T estosterone w hen the sperm count is too high. The Sertoli cells produce INHIBIN. INHIBIN inhibits the release of GnRH and FSH, which will SLOW DOWN spermatogenesis If the sperm count reaches 20 million/ml, the Sertoli cells STOPS the release of inhibin , and the sperm count increases.

9. FEMALE HORMONE Pituitary LH FSH Ovarian Estrogen Progesterone

10. Corpus Luteum Secrete - Progesterone Relaxin Progesteron maintain endometrium lining during pregnancy. Relaxin helps in parturition by sofftening of pubic symphasis .

11. Estrogen and Progesterone     Estrogen   - proliferation of endometrium lining of uterus secondary sexual characters in females.   Progesterone   maintain endometrium lining during pregnancy.

12. LH and FSH FSH – Follicular development LH - development of ova, induction of ovulation, and stimulation of estradiol and progesterone production by the ovaries. Estradiol / estrogen prepare the body for pregnancy, produces secondary sex characteristics .