Successful conception usually means that the fertilized egg is implanted in the uterine cavity and undergoes normal growth and development. At this time, pregnancy can be diagnosed by checking the blood HCG, and conception can take place about 7 days after intercourse. After successful conception, the HCG in the urine will not rise immediately, and pregnancy cannot be detected with pregnancy test paper or pregnancy test stick, but about one week after conception, the HCG in the urine can rise, and at this time, the test paper can be used to check the weakly positive or positive performance. If a woman’s fertilized egg is deposited in the fallopian tube and grows, due to the production environment in the fallopian tube is not particularly good, the time of conception may be later, mostly about 10 days after intercourse, the time of checking pregnancy will be delayed accordingly, and HCG hormone produced by gestational trophoblast cells is also relatively low.