Can a pregnancy test come back negative if you too early - meaning just few days after conception?

Pregnancy tests typically detect the presence of human chorionic gonadotropin (hCG), a hormone produced by the developing placenta after implantation of a fertilized egg. The concentration of hCG in urine or blood increases rapidly in early pregnancy, but it takes time for the levels to become detectable by a pregnancy test.

Most home pregnancy tests are designed to detect hCG levels of 25 mIU/mL or higher in urine. However, the sensitivity of different tests can vary. Some tests may be able to detect lower levels of hCG, while others may require higher levels.

If you take a pregnancy test too early after conception, the hCG levels in your urine or blood may still be below the level that the test can detect, resulting in a negative result. For most accurate results, it's recommended to wait until at least a week after your missed period to take a home pregnancy test. If you get a negative result but suspect you might be pregnant, you can repeat the test in a few days or consider getting a blood test for hCG levels. Blood tests can detect lower levels of hCG and may be able to provide earlier confirmation of pregnancy.

It's important to follow the instructions on the pregnancy test packaging to ensure accurate results and to read the results within the specified timeframe. If you have any uncertainties about the results or have concerns about your pregnancy status, it's best to consult a healthcare professional for guidance.