A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin, or hCG, in a person’s body. But the body doesn’t produce that hormone until several days after conception.

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 ...

If you see a faint line on your pregnancy test after it’s dried, it’s probably an evaporation line. This can be confused with a positive result. To avoid this, make sure to check the test within the ...

Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage ...