Patient’s Question: Disease: Hepatitis B major triplet Description: The liver function was abnormal 42 days after delivery and the virus was 5 times 10. Please give me some advice. I fell and hit my belly when I was 8 months pregnant, but there was no bleeding at that time, could this cause the microvascular rupture of the placenta to infect the fetus? If I was infected at that time, can I have a cord blood test one and a half months later to find out if the fetus is infected? The cord blood result was positive for the fifth item and negative for the others. I am worried about intrauterine infection of the fetus. Diagnosis: The chance of microvascular rupture of the placenta is not determinable, that is, we do not know whether it will happen or not, but if it does, the chance of fetal infection exists, continue to assume that if it is infected, a month’s time should be able to determine, the cord blood is positive for core antibodies, indicating that signs of infection can be detected in the circulatory pathway of the cord blood, but the core antibodies are not infectious, it is only In the end, even if the cord blood is positive for core antibodies, it does not prove that the fetus is definitely infected, as the mother can have antibodies delivered to the placenta at 20 weeks of pregnancy. The most reliable way is to have a blood test for hepatitis B virus about one month after the birth of the fetus.