how long after sex does a pregnancy test work
2. If you have irregular period or are not sure when you ovulated, you can do a urine home pregnancy test 14 days after you last had unprotected sex. However for accuracy of result, it is recommeneded to do the test 21 days after intercourse.. If you have irregular period or are not sure when you ovulated, you can do a urine home pregnancy test 14 days after you last had unprotected sex. However for accuracy of result, it is recommeneded to do the test 21 days after intercourse.