It can be detected a few days after conception.

For women with regular menstruation, generally in 7-10 days after conception, blood hcg value to determine whether pregnant, can also be in pregnancy about 14 days, check urine hcg, it is recommended to choose morning urine, check the results are more accurate. If urine pregnancy test paper positive, generally consider pregnancy initially. It is recommended that four to six weeks of pregnancy, go to the hospital to do a b-ultrasound examination, rule out ectopic pregnancy.