Answer: hCG (human chorionic gonadotropin).
- A FSH, which rises sharply after implantation
- B LH, surging from the anterior pituitary
- C hCG (human chorionic gonadotropin)
- D Progesterone, secreted directly by the placenta
Correct answer: C. hCG (human chorionic gonadotropin)
Explanation: hCG (human chorionic gonadotropin) is produced by the developing placenta after implantation. It is detected in urine and blood by pregnancy tests. hCG maintains the corpus luteum and progesterone production in early pregnancy.
The human male reproductive system: sperm formed in the testis mature in the epididymis and travel via the vas deferens, mixing with secretions of the seminal vesicle, prostate and bulbourethral glands. Image: Wumingbai, CC BY-SA 4.0, via Wikimedia Commons.
Concept context
Male and female reproductive systems, gametogenesis, fertilization, implantation, pregnancy, and reproductive health.