Pregnancy can be detected in advance by using a urine early pregnancy test.
If pregnancy occurs after intercourse, it usually takes about a week for the fertilized egg to settle in the uterus and the body will secrete human chorionic gonadotropin (HCG). HCG can usually be detected in a pregnant woman’s urine after the fertilized egg has been deposited. At this time, because the gestational sac is small, the ultrasound may not be able to detect the tissue of the gestational sac, so you can use urine pregnancy test paper to test whether you are pregnant in advance.
Because HCG will be detected earlier from the blood, so if you need to clarify whether the pregnancy, you can be 7 days after intercourse, that is, a few days after the implantation of fertilized eggs, blood HCG test, in order to facilitate the early detection of whether there is a situation of pregnancy.