Inhibin
- Secreted by sertoli cells in males and granulosa cells in females.
- Inhibits FSH from ant pituitary
Activin
- Secreted by sertoli cells in males and granulosa cells in females.
- Stimulates FSH secretion.
Relaxin
- Secreted in females by corpus luteum and placenta.
- Relaxes symphysis and sacroiliac joints during pregnancy and helps in cervical ripening.
- Similar to Insulin and IGF structurally.
Testosterone
Secreted by interstitial cells of leydig
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