A positive pregnancy test for Hepatitis B 2, 4 and 5 usually has no effect on the fetus. Hepatitis B 2, 4, 5 positive indicates that the person tested has been infected with hepatitis B virus, but at present the body has been slowly recovering, the virus will slowly disappear from the body, so the pregnancy test of hepatitis B two halves of 2, 4, 5 is the pregnant woman has the performance of the antibody, the fetus will not have an impact. Generally, such pregnant women need to further check the hepatitis B DNA, if the hepatitis B DNA is also negative, there is no need to do special treatment, and there are already protective antibodies, generally will not be infected with hepatitis B again. If you are overly concerned about the abnormalities found in the hepatitis B half-pair test during your pregnancy checkup, it is recommended that you go to the hospital in time to avoid affecting the health of your fetus.