2-3 weeks after intercourse can be detected, you can choose to use early pregnancy test paper or pregnancy test stick to collect morning urine test, the accuracy is relatively high. If you are not sure, you can go to the hospital to collect venous blood for examination. The main thing is not to take contraceptive measures of sexual life are possible to get pregnant, just the chances of pregnancy are different, the chances of pregnancy in the ovulation is higher, mainly sperm and egg combination will be pregnant, if the test paper test to determine the pregnancy, but also to go to the hospital to do a formal examination, the test method is not the final determination of the results of the pregnancy. In preparation for pregnancy to do pre-pregnancy examination, to ensure that the health of the body before pregnancy, in the early stages of pregnancy must be timely supplement folic acid, can prevent fetal deformity, in the early stages of pregnancy must not be cohabitation, otherwise it is easy to cause fetal abortion.