Patient Question: Hello, Dr. Wang, I am 25 weeks pregnant and I have blood type O. Will the child be prone to bo hemolysis later? Answer from Dr. Wang, Department of Obstetrics and Gynecology, Peking University People’s Hospital: ABO blood group incompatibility leads to severe intrauterine hemolysis of the fetus, the possibility of abnormalities is very small, and there is no effective treatment during pregnancy, so there is no need to routinely check antibody titers, the current examination strategy is mainly to monitor the daily bilirubin changes in the newborn after birth, and then start treatment if there are abnormalities. In the rare cases where hemolysis occurs in the uterus, there will be some manifestations on the ultrasound that can indicate abnormalities. It is possible to have your loved one’s blood type checked.