20 days in the same room can you detect pregnancy?

20 days in the same room may be able to detect pregnancy, may not be detected. Because the date of the patient's cohabitation is not combined with the patient's menstrual cycle, coupled with each person's constitution is not the same, so 20 days after the same room may not be detected. If in ovulation cohabitation, the earliest or even 10 days after the same room may be detected, but if it is other periods of cohabitation, it may show no pregnancy. In the detection of pregnancy, it is recommended that patients go to a regular hospital to measure the content of HCG in blood. If the patient chooses a pregnancy test paper or pregnancy test stick, there may be discrepancies with the true results, and the detection time is relatively late for blood HCG detection.