A member asked:

Took morning after pill on the week of 25th dec, bleed for 5 days from 1-5 jan, havent had next period. urine and blood test -, should i worry?

12 doctors weighed in across 2 answers

Tests are accurate: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early, such as less than 2 weeks after sex.

Answered 3/25/2022

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HCG blood test: Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. If in doubt get a blood test for HCG level.

Answered 3/25/2022

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