female reproductive cycle

Question 1

What does the hypothalamus produce in the menstrual cycle?

Answer 1

GnRH: Gonadotrophin releasing hormone

Question 2

What does the anterior Pituitary glands release in female repro?

Answer 2

• FSH: follicle stimulating hormone

- LH: Luitenising hormone

Question 3

What are the 2 phases of menstrual cycle?

Answer 3

Follicular phase (day 0-14)

Luteal phase (day 14-28)

Question 4

What hormone inhibit LH at low concentration?

Answer 4

oestrogen

Question 5

The increase of what hormone reduce FSH?

Answer 5

Oestrogen

Question 6

When is the negative and positive feedback of oestrogen?

Answer 6

negative - before 10 days

positive - after 10 days

Question 7

What triggers ovulation

Answer 7

massive rise of LH which will then drop after ovulation

Question 8

What hormones does corpus luteum release?

Answer 8

Oestrogen
Inhibitin
Progesterone

Question 9

When does corpus luteum form?

Answer 9

after ovulation

Question 10

What does the inhibitin do?

Answer 10

suppress FSH secretion

Question 11

What does the progesterone do in the luteal phase?

Answer 11

• suppress GnRH (thus reduce LH and FSH).

- Stimulate endometrial growth.

Question 12

What happens when corpus luteum degerate at the end of luteal phase?

Answer 12

progesterone decrease - GnRH levels increase - period and NEW CYCLE