If a pregnancy test can detect pregnancy within two weeks after fertilization, it most likely works by:
A) detecting the hormone human chorionic gonadotropin in the woman's urine
B) detecting a rise in the woman's body temperature from 98.6 to about 99.3
C) detecting the presence of a much higher percentage of alpha brain waves during the woman's sleep cycles
D) detecting a dramatic increase in the acidity of the woman's urine

Question

Quizplus · Accepted Answer

Pregnancy tests work by detecting the hormone human chorionic gonadotropin (hCG) which is produced by the placenta after fertilization. The level of hCG increases rapidly in early pregnancy and can be detected in urine as early as two weeks after fertilization.

If a Pregnancy Test Can Detect Pregnancy Within Two Weeks