A positive test is based on the secretion of Human chorionic gonadotropin hormone (hCG) found in Hannah's urine.
The human chorionic gonadotropin (hCG) urine test is a pregnancy test. A pregnant woman's placenta produces hCG, also called the pregnancy hormone. If you're pregnant, the test can usually detect this hormone in your urine about a day after your first missed period.
This is made almost exclusively in the placenta. HCG increasing hormone levels found in the mother's blood and urine rise a lot during the first trimester. It appears shortly after the embryo attaches to the wall of the uterus.
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