Menstrual Cycle (3)

Function of estrogen in a menstrual cycle (1)

Repairs and stimulates the thickening of the endometrium

Function of estrogen in a menstrual cycle (2)

Stimulates follicle growth until it matures

Function of estrogen in a menstrual cycle (3)

Stimulates FSH and LH release prior to ovulation

Function of progesterone in a menstrual cycle (1)

Stimulates the thickening of the endometrium, making it thick, folded and rich in blood vessels to prepare for the implantation of embryo

Function of progesterone in a menstrual cycle (2)

Stops the release of FSH and LH to prevent follicle growth and ovulation

Stages of events in menstrual cycle during day 0-5 (1)

Before a menstrual cycle begins, the level of hormones is low

Stages of events in menstrual cycle during day 0-5 (2)

With the absence of stimulation from progesterone and oestrogen, the thickened endometrium will shed and menstruation will begin (first day)

Stages of events in menstrual cycle during day 0-5 (3)

A menstrual cycle begins a day before menstruation when the hypothalamus releases the gonadotrophin-releasing hormone (GnRH

Stages of events in menstrual cycle during day 0-5 (4)

GnRH stimulates the pituitary gland to release the follicle-stimulating hormone (FSH) and luteinizing hormone (LH) into the blood

Stages of events in menstrual cycle during day 0-5 (5)

FSH stimulates follicle growth in the ovary