What would happen if the placenta was not able to fulfill its endocrine function in a pregnant woman? A. The level of hCG released by the trophoblast would increase B. Mature follicles would not be released by the ovaries C. FSH and LH levels would increase D. The corpus luteum would not be maintained

In the fertility awareness method of birth control, a woman gauges her monthly fertile period by monitoring changes in the consistency of her vaginal mucus. What kind of information does such a method provide about the likelihood of getting pregnant?

Which hormone is primarily responsible for the contractions during labor? a. oxytocin b. estrogen c. -HCG d. progesterone

Figure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.