Hormonal control of the menstrual cycle
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I can explain the roles of FSH, LH, oestrogen and progesterone in controlling the menstrual cycle in human females.
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FSH causes follicle maturation and secretion of oestrogen by the ovaries.
Oestrogen causes thickening of uterus wall, secretion of LH by the pituitary gland and inhibits the release of FSH.
LH causes ovulation; FSH and LH cause the mature follicle to break down and secrete progesterone.
Progesterone prepares uterus lining for implantation of fertilised egg; stops secretion of LH & FSH by pituitary gland.
Fall in progesterone causes menstruation.
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