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The Menstrual Cycle Secondary Sexual
Oestrogen Stimulates the lining of the uterus Interacts with other hormones to
to build up. develop female secondary sexual
Reduces the levels of FSH characteristics.
produced by the pituitary gland
and increases levels of LH.
Progesterone Stimulates the growth of blood Interacts with other hormones to
vessels in the lining of the uterus develop female secondary sexual
in preparation for pregnancy. characteristics.
Helps keep the pregnancy going if
a fertilised ovum arrives in the