Many home pregnancy tests claim to be 99% accurate if used on the day of the expected period. Testing too early can give a false negative because there might not be enough HCG for the test to detect.

Beta-hCG is a shorthand term for a blood test used to measure hCG levels in early pregnancy. Find out what these levels mean. Many pregnant people and those trying to conceive may have heard the term ...

Medically reviewed by Alyssa Dweck, MS, MD, FACOG Key Points Pregnancy tests can expire, making it harder to get accurate ...