Menstrual Cycle

Oestrogen - produced by the ovaries (egg follicles). Stimulates the release of LH and causes the thickening of the wall.

Progesterone - produced by the corpus lutem. Maintains the wall of the uterus and inhibits LH and FSH.

LH - produced by the pituary gland. Triggers ovulation.

FSH - produced by the pituary gland. Allows an egg follicle to form.

1. Falling levels of progesterone, due to the fading of the corpus…