Our Privacy/Cookie Policy contains detailed information about the types of cookies & related technology on our site, and some ways to opt out. By using the site, you agree to the uses of cookies and other technology as outlined in our Policy, and to our Terms of Use.

Close

What Hormone Do Pregnancy Tests Look for?

Pregnancy tests look for human chorionic gonadotropin or HCG, which is produced by the placenta. A blood or urine test can detect HCG, explains Dr. Kecia Gaither, Director of Maternal Fetal Medicine in the Department of Obstetrics and Gynecology at Brookdale University Hospital in Brooklyn, New York. The amount of HCG increases each day after conception.

Photo via BananaStock/BananaStock/Getty Images

More from pregnancy