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Testosterone is a steroid hormone that is produced in the leydig cells within the testes and also via theca interna cells within follicles. In males the target tissue for testosterone are the anterior pituitary gland, specifically the gonadotroph cells. In females the target tissues are the brain, skeletal muscle and granulosa cells. This is because testosterone acts as a substrate for estradiol. The synthesis of testosterone rather than estradiol can lead to abnormal masculinisation in females. In males the primary action of testosterone is anabolic growth, spermatogenesis promotion and promotion of secretion from the accessory sex glands.  
 
Testosterone is a steroid hormone that is produced in the leydig cells within the testes and also via theca interna cells within follicles. In males the target tissue for testosterone are the anterior pituitary gland, specifically the gonadotroph cells. In females the target tissues are the brain, skeletal muscle and granulosa cells. This is because testosterone acts as a substrate for estradiol. The synthesis of testosterone rather than estradiol can lead to abnormal masculinisation in females. In males the primary action of testosterone is anabolic growth, spermatogenesis promotion and promotion of secretion from the accessory sex glands.  
 
===Inhibin===
 
===Inhibin===
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Inhibin is a type of glycoprotein that is synthesised within the granulosa cells in females and in sertoli cells in the male. In both males and females the target organ for inhibin is the anterior pituitary, specifically the gonadotroph cells. In the male inhibin inhibits FSH secretion whilst in females it stimulates FSH secretion.
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===Activin===
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Activin is a glycoprotein that is produced within granulosa cells in females and sertoli cells in the male. The target tissue for activiin in the male is the epididymis whilst in the female it is the anterior pituitary gland, specifically gonadotroph cells. In males and females activin stimulates FSH secretion.
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===Prostaglandin F2α===
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