After the fertilized ovum is implanted, the corpus luteum is maintained by the presence of which hormone(s)?
a. estrogen and progesterone c. human chorionic gonadotropin
b. follicle-stimulating hormone d. luteinizing hormone
C
After the fertilized ovum is implanted, the corpus luteum is maintained by the presence of human chorionic gonadotropin (HCG) which is secreted by the implanting blastocyst. HCG is the hormone tested in at-home pregnancy kits. Estrogen and progesterone do not maintain the presence of the corpus luteum. Follicle-stimulating hormone is engaged in ripening of one ovarian follicle. Luteinizing hormone stimulates the development of the corpus luteum.
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