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Implantation and Placental Development

The average ovulatory menstrual cycle ranges from 25 to 32 days. Which phase of the cycle is most consistent in length?

a. Luteal

b. Antral

c. Follicular

d. Proliferative

A 30-year-old woman who is attempting to achieve pregnancy uses an ovulation prediction kit based on detecting the surge of luteinizing hormone (LH) to time intercourse. When does LH secretion peak in reference to ovulation?

a. 24 hours after

b. 24 hours before

c. 10–12 hours after

d. 10–12 hours before

Which of the following is not stimulated by the luteinizing hormone surge?

a. Release of first polar body

b. Expansion of the cumulus complex

c. Resumption of meiosis in the ovum

d. Inhibition of progesterone production by cumulus cells

What hormone rescues the corpus luteum during early pregnancy?

a. Progesterone

b. Androstenedione

c. Human placental lactogen

d. Human chorionic gonadotropin

The appearance of the endometrial gland in the image below is consistent with what phase of the menstrual cycle?

Reproduced with permission from Cunningham FG, Leveno KJ, Bloom SL, et al (eds): Implantation and placental development. In William Obstetrics, 25th ed. New York, McGraw-Hill, 2018, Figure 5-4.

a. Late secretory

b. Early secretory

c. Late proliferative

d. Early proliferative

The appearance of the endometrial gland in the image below, rupture of which blood vessel triggers menstrual bleeding?

Reproduced with permission from Cunningham FG, Leveno KJ, Bloom SL, et al (eds): Implantation and placental development. In William Obstetrics, 25th ed. New York, McGraw-Hill, 2018, ...

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