Question

multiple choice question
over the counter pregnancy tests are based on the detection of ______ in the urine.
o estrogen
o human chorionic gonadotropin
o antigens to the babys blood
o placental lactogen
o progesterone

Explanation:

Over - the - counter pregnancy tests work by detecting a specific hormone. Estrogen and progesterone are hormones involved in the menstrual cycle and pregnancy maintenance but are not the key hormones detected in these tests. Antigens to the baby's blood are not relevant as pregnancy tests are not based on blood antigen detection. Placental lactogen is involved in metabolic changes during pregnancy but is not the marker for over - the - counter pregnancy tests. Human chorionic gonadotropin (hCG) is produced by the trophoblast cells of the developing embryo (later the placenta) and is the hormone that over - the - counter pregnancy tests are designed to detect in urine.

Answer:

human chorionic gonadotropin