menstrual cycle and secondary sexual characteristics 17

What is the menstrual cycle?

The change in the in the uterine limning, in the endometrium and the vagina

Why does the menstrual cycle occur?

in preparation for a developing embryo in case the egg released at the ovulation is fertilised and for the possible implantation of the embryo

What other cycle is close to the menstrual cycle?

Ovarian

Which hormones are the menstrual cycle mainly controlled by?

Oestrogen and progesterone

When does the menstrual cycle begin and end?

Puberty and menopause

When does menopause begin?

Menopause begins after menstruation has stopped for 12 consecutive months as a result of the ovaries ceasing reproductive hormone production, which also marks the end of the ovarian cycle

What happens when the follicle matures in the ovarian cycle?

Oestrogen causes the endometrium of the uterus to become thicker and softer

What structural changes occur in the endometrium post-ovulation?

The number of blood vessels and mucus-secreting glands increases

What does the endometrium secrete post-ovulation and what is it rich in?

A watery mucus rich in glycogen

What happens to the corpus luteum if fertilisation does not occur?

It degenerates due to decreasing levels of progesterone

When does menstruation occur in relation to ovulation?

14 days post-ovulation

What is shed during menstruation?

The uterine lining, blood capillaries, mucous secretion, and cell debris via the vagina