Maternity Nursing Q 378

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The hormone responsible for a positive pregnancy test is:

  

     A. Estrogen

     B. Progesterone

     C. Human Chorionic Gonadotropin

     D. Follicle Stimulating Hormone

    

    

Correct Answer: C. Human Chorionic Gonadotropin

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Human chorionic gonadotropin (HCG) is the hormone secreted by the chorionic villi which is the precursor of the placenta. In the early stage of pregnancy, while the placenta is not yet fully developed, the major hormone that sustains the pregnancy is HCG.

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Option A: Estrogen helps control the menstrual cycle and is important for childbearing. Estrogen also has other functions: it keeps cholesterol in control and protects bone health for both women and men.

Option B: Progesterone prepares the endometrium for the potential of pregnancy after ovulation. It triggers the lining to thicken to accept a fertilized egg. It also prohibits the muscle contractions in the uterus that would cause the body to reject an egg.

Option D: In women, FSH helps control the menstrual cycle and stimulates the growth of eggs in the ovaries. FSH levels in women change throughout the menstrual cycle, with the highest levels happening just before an egg is released by the ovary. This is known as ovulation. In men, FSH helps control the production of sperm.

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