Estrogen

Estrogen is the hormone produced by the follicle growing on the ovary that is responsible for the secondary sex characteristics in the female:

• absence of muscle development
• development of mammary glands
• development of reproductive systems and external genitalia
• fat deposition on hips and stomach (source of energy)
• triggering of estrous cycle at puberty
• triggering of heat
• depresses FSH production when follicle is mature

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