Estrogen is a key reproductive hormone.
Estrogen initiates female pubertal development, including breat development, widening of the pelvis, and distribution of body fat.
Together with progesterone, estrogen regulates the menstrual cycle.
plasma estradiol levels during the menstrual cycle
phase
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plasma levels (pmol/L)
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FSH, released from the anterior pituitary, acts on granulosa cells in the ovary, inducing their production of estrogen.