Syncytiotrophoblast produces human chorionic gonadotropin

A 24-year-old sexually active woman with regular 29-day menstrual cycles presents to the clinic complaining that her period is two weeks late. Physical exam reveals no abnormalities. Pregnancy is confirmed by urine test.
Syncytiotrophoblast produces human chorionic gonadotropin (hCG), which stimulates estrogen production by the corpus albicans.
Syncytiotrophoblast produces human chorionic gonadotropin (hCG), which stimulates progesterone production by the corpus luteum.
Syncytiotrophoblast produces luteinizing hormone (LH), which stimulates estrogen production by the corpus luteum.
Zygote produces human chorionic gonadotropin (hCG), which stimulates estrogen production by the corpus albicans.
Zygote produces luteinizing hormone (LH), which stimulates progesterone production by the corpus luteum.
Option 6

Correct answer
Syncytiotrophoblast produces human chorionic gonadotropin (hCG), which stimulates progesterone production by the corpus luteum.
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correct answer: B
The correct answer is B, Syncytiotrophoblast produces human chorionic gonadotropin (hCG), which stimulates progesterone production by the corpus luteum.
Choice A and Choice E are incorrect because the zygote does not produce hCG; further, hCG stimulates the corpus luteum–not corpus albicans. (A corpus albicans is an involuted, non-functional corpus luteum.) Additionally, though hCG stimulates some estrogen production by the corpus luteum, progesterone is the predominant product and is more responsible for absence of menses.

Choice C is incorrect because the syncytiotrophoblast does not produce leuteinizing hormone (LH), and LH does not stimulate the corpus luteum. The primary stimulant of the corpus luteum is hCG; though some estrogen is produced, progesterone is the predominant product and is more responsible for absence of menses.

Choice D is incorrect because the zygote does not produce leuteinizing hormone (LH), and LH does not stimulate the corpus luteum.