[Campbell Biology P.1084] What is the primary role of human chorionic gonadotropin hCG during... | Practice Question

What is the primary role of human chorionic gonadotropin hCG during the first trimester of pregnancy, as described in the text?

  • A: To initiate ovulation and release of a secondary oocyte.
  • B: To stimulate the formation of the blastocyst.
  • C: To maintain the secretion of progesterone and estrogens by the corpus luteum.
  • D: To directly provide nutrients to the implanted embryo from the endometrium.

Explanation

The text explicitly states that "One embryonic hormone, human chorionic gonadotropin hCG , acts like pituitary LH in maintaining secretion of progesterone and estrogens by the corpus luteum through the first few months of pregnancy." This maintenance is crucial for sustaining the uterine lining and preventing menstruation, thus supporting the pregnancy.