Hormone regulation prevents ovulation and menstruation during pregnancy Steps:

• FSH stimulates ovarian follicle growth; LH triggers ovulation and corpus luteum formation.
• During pregnancy, placental hormones (hCG, estrogen, progesterone) inhibit hypothalamic GnRH release.
• Suppressed GnRH reduces pituitary FSH and LH secretion, preventing egg development/release.
• Progesterone remains high from corpus luteum (via hCG) and placenta to maintain uterine lining.

Why none of the options are correct:

• Progesterone is high during pregnancy to sustain pregnancy, but all choices list it as low.

Why the others are wrong:

• A: Matches low FSH/LH but ignores high progesterone.
• C: FSH/LH are low, not high.
• D: LH is low, not high.

Final answer: low FSH, low LH, high progesterone