An elevation of plasma levels of estrogen and progesterone Trophoblastic cells In the absence of human chorionic gonadotropin The luteal phase of the ovarian cycle The endometrium The zygote The proliferative phase of the uterine cycle The graafian follicle The secretory phase of the uterine cycle Menstruation occurs is response to

1. An elevation of plasma levels of estrogen and progesterone

prevents the release of FSH and LH

2. Trophoblastic cells

assist with implantation

3. In the absence of human chorionic gonadotropin

the corpus luteum deteriorates into the corpus albicans

4. The luteal phase of the ovarian cycle

is responsible for the uterine secretory phase

5. The endometrium

is the uterine lining that is most responsive to the hormonal effects of estrogen and progesterone

6. The zygote

is the fertilized ovum

7. The proliferative phase of the uterine cycle

refers to the estrogen-induced thickening of the endometrium

8. The graafian follicle

is the mature follicle

9. The secretory phase of the uterine cycle

is the endometrial response to progesterone

10. Menstruation occurs is response to

diminished plasma levels of estrogen and progesterone