The best time to do a pregnancy test is from the first day of a missed period. For more accurate results, it is recommended to wait a week after the missed period. Pregnancy tests work by detecting the hormone hCG, which typically reaches detectable levels in urine about 7-10 days after ovulation. If the menstrual cycle is irregular or the date of the next period is unknown, it is advised to take the test at least 21 days after having unprotected sex. Testing too early can lead to false negatives because hCG levels might not be high enough yet to be detected. Summary:
- Take the test from the first day of a missed period for accuracy.
- Waiting a week after the missed period improves reliability.
- If unsure about the cycle, wait at least 21 days after unprotected sex.
- Early tests are available but may not be as reliable before the missed period.
This guidance applies to most at-home pregnancy tests, with variations in sensitivity among different brands.
