Which hormone level increases in the luteal phase?
a)	LH	b)	Progesterone	c)	Testosterone	d)	FSH

Phases

Days

Events

Menstrual phase

1-5

Endometrium breaks down, menstruation begins. The cells of endometrium, secretions, blood and the unfertilized ovum constitute the menstrual flow. Progesterone and LH production is reduced

Follicular phase (proliferative phase)

6-13

Endometrium rebuilds, FSH secretion and oestrogen’s secretion increase

Ovulatory phase

14

Both LH and FSH attain a peak level. Concentration of oestrogen in the blood is also high and reaches its peak, Ovulation occurs

Luteal phase (secretory phase)

15-28

Corpus luteum secretes progesterone. Endometrium thickens and uterine glands become secretory