It takes about 14 days of coitus to detect it with test strips. A blood test for HCG can usually confirm the diagnosis after about 10 days of intercourse.
1. A coitus: about 14 days after coitus with a pregnancy test stick, if it is two bars means pregnant, if it is one bar, basically exclude pregnancy, if a deep and light, do not rule out pregnancy. Waiting a few more days for the test usually confirms the pregnancy.
2. Blood test: When you have been sexually active for more than 10 days, go to the hospital and take a blood test for HCG, which can usually confirm whether you are pregnant. This test is relatively accurate.
If you want to know for sure whether you are pregnant or not, you need to go to the hospital and have the test conducted under the guidance of a doctor to make a clear diagnosis.