You should wait at least 14 days after unprotected sex before taking a pregnancy test for the most reliable results. This waiting period allows your body enough time to produce detectable levels of the pregnancy hormone hCG, which becomes measurable about 2-3 days after implantation, and implantation itself typically occurs 6-12 days after fertilization. Testing too early, such as within the first week after sex, often results in false negatives because the hormone levels may not be high enough yet. For even more accuracy, many recommend testing after a missed period, which is usually about 21 days after unprotected sex. Early detection tests may work slightly sooner, around 12-14 days, but waiting reduces the chances of inaccurate results. Blood tests at a clinic can detect pregnancy slightly earlier, about 10-12 days after sex. Key points:
- Earliest reliable home test: ~14 days after sex
- Most accurate testing: after missed period (~21 days)
- Hormone (hCG) detectable 2-3 days after implantation
- Implantation happens 6-12 days after fertilization
This timeline ensures pregnancy test results are as accurate as possible.
