Erythropoiesis in the earliest days of gestation is the function of:

1.	yolk sac	2.	chorion
3.	fetal bone marrow	4.	amnion

A second pregnancy during an ongoing pregnancy is prevented by:

The most critical period of gestation where the fetus is most vulnerable to genetic birth defects from drugs taken by the mother is:

Implantation does not:
1. involve a blastocyst
2. occur in the uterine tube
3. establishes pregnancy
4. occurs by seventh-eighth day

Seminal plasma has contributions of all the following except:
1. bulbourethral glands.
2. testes.
3. seminal vesicles.
4. prostate gland

Type B spermatogonia divide to form:

Identify the cell that can be seen in primordial, primary, secondary and tertiary follicle :

The number of mature ova produced by a young, healthy, nonpregnant adult woman each year would be:

The correct chronology in the ovarian cycle in a non-pregnant woman would be:

If pregnancy is established, the corpus luteum:
I. is no longer needed because of hormones produced by the pre-embryo
II. typically continues to secrete progesterone through the third month of pregnancy
III. transforms into a corpus albicans soon after the placenta is fully functional