Human Reproduction — BIOLOGY STD 12 Science — Question

Menstrual cycle is the cyclic change (itf' the reproductive tract of primate female. This period is marked by a characteristic event repeated almost every month (28 days with minor variation) in the form of a menstrual flow (i.e shedding of the endometrium of the uterus with bleeding). It may be temporarily stopped only in pregnancy.
The hormones that regulates menstrual cycles are:

1. FSH (Follicle stimulating hormone).
2. LH (Luteinizing hormone).
3. Oestrogens.
4. Progesterone.