After a period of sexual intercourse, if you notice any unusual symptoms in your body, you should consider whether you are pregnant. If you don't want to go for a check-up, you can still test for pregnancy at home. The simplest method is to test your urine. So what's the reason for a negative morning urine test on the 13th day of sexual intercourse?
What is the reason for a negative morning urine test after 13 days of sexual intercourse
Generally, if the test strip test shows positive after 12 days of conception in sexual intercourse, and the test result is negative after 13 days of sexual intercourse, then pregnancy is not considered. Generally speaking, after 13 days of sexual intercourse, if pregnant, a positive or negative urine test in early pregnancy can basically rule out pregnancy. However, there is a possibility of errors in this type of examination, and it cannot be determined with certainty. Further examination of blood HCG is needed to determine if pregnancy has occurred. The blood HCG test results are relatively reliable, and there can be an increase after 11 days of sexual intercourse.
How long after sexual intercourse can pregnancy be tested
1. Pregnancy tests can be conducted 8 to 11 days after sexual intercourse, and hCG levels can be measured through blood tests 8 to 11 days after conception. Blood hCG appears earlier than urine hCG, and blood hCG testing is much more accurate. The working principle of using early pregnancy test strips to detect early pregnancy is to measure the value of human chorionic gonadotropin.
2. But due to the small quantity, it was not easy to test at first, and it became increasingly evident only after 10 to 14 days. Not all pregnant women emit hCG hormone at the same rate and in the same amount, which varies from person to person. Premature urine testing may result in incorrect negative reactions.
To determine pregnancy through urine testing after sexual intercourse, it is important to choose the right time, preferably around ten days after intercourse, otherwise the measurement results may be incorrect. However, the pregnancy test stick may have certain defects and cannot guarantee completely accurate measurement results. It should be combined with one's own situation, and blood tests are generally more accurate.
