Menstrual Cycle Hormones

Question 0

When does LH peak?

Answer 0

18 hours prior to the release of the ovum

Question 1

What hormones does the anterior pituitary gland produce?

Answer 1

Luteinising hormone

Follicle stimulating hormone

Question 2

How high are levels of LH in childhood, during puberty, and in the menopause?

Answer 2

Childhood- low
Puberty - high
Menopause - highest

Question 3

What does LH do?

Answer 3

Stimulates growth of the corpus luteum

Question 4

Where is progesterone produced?

Answer 4

By the corpus luteum

By the placenta in pregnancy

Question 5

What does progesterone do?

Answer 5

Creates secretory changes in the endometrium, and stimulates the production of thick cervical mucus

Relaxes smooth muscle and inhibits lactation in pregnancy. Levels drop before labour

Question 6

What does FSH do?

Answer 6

Stimulates the growth of 6-12 follicles a month

Rise in FSH at onset of menstruation, then levels fall as oestrogen levels increase

Oestrogen and inhibin from the ovary inhibit FSH, as well as high levels of progesterone

Question 7

Where is oestradiol secreted?

Answer 7

Secreted by the ovary

Question 8

What does oestradiol do?

Answer 8

Stimulates proliferation of glandular and stromal elements of the epithelium

Increases progesterone receptors in endometrial cells

Thins cervical mucus