A) Oestrogens
B) FSH
C) FSH-RH
D) Progesterone
Correct Answer: D
Solution :
Menstruation is caused by the reduction of oestrogen and progesterone, especially progesterone at the end of monthly ovarian cycle. The first effect is decreased stimulation of the endometrial cells by these two hormones followed rapidly by involution of the endometrium itself to about 65% of its previous thickness.
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