Implantation bleeding a few days can test pregnancy

After implantation, the trophoblast normally secretes HCG, and elevated levels of HCG can be detected in the serum. Therefore, even if the fertilized egg shows vaginal bleeding after implantation, HCG can be detected in the blood. If the HCG level is greater than the reference range, pregnancy is considered. For women with regular menstruation, if there has been a recent history of sexual life, once menstruation is delayed for more than ten days suspected of pregnancy, blood chorionic gonadotropin and urine pregnancy tests can be tested to rule out pregnancy. For women with irregular menstruation, eight days after cohabitation can be tested hcg to determine whether they are pregnant.