Pregnancy test Created 2026-10-31 Updated 2026-11-05
View more
A pregnancy test detects or measures human chorionic gonadotropin in urine or blood. The placenta produces this hormone after implantation, giving the measurement its biological connection to pregnancy.
A qualitative result applies a detection rule, while a quantitative blood test estimates the hormone level. The sampling time and the test's detection capability therefore affect what a negative result can establish. Detection of a biochemical signal is one observation within clinical diagnosis, rather than a complete description of the pregnancy's development.[ref]
Read the full article