What causes a chemical pregnancy?

What causes a chemical pregnancy?

With a chemical pregnancy, the embryo produces hCG, a hormone that it needs to grow. It’s also the hormone that pregnancy tests check for to see if you’re pregnant. If an embryo stops developing, it no longer produces hCG.

No one knows exactly why an embryo stops developing during a chemical pregnancy. Likely, the embryo stops developing because of a problem in its genetic makeup, or DNA. Sometimes, an embryo doesn’t take hold, or implant, in the uterus lining the way it needs to in order to grow. As a result, your hCG levels drop, and pregnancy tests come back negative.