Positive syphilis antibodies may or may not be contagious to the fetus and need to be analyzed specifically. 1. May be contagious: Syphilis spirochetes in the mother’s body may be transmitted through the umbilical cord or placenta, resulting in fetal infection. During labor, if the skin of the fetus is abraded during delivery, the syphilis spirochetes in the vaginal secretions and blood may pass through the skin and mucous membranes and enter the child’s body. 2. Not contagious: Some women have been cured of syphilis, but there may still be syphilis antibodies in their blood, so the test may show positive syphilis antibodies. If the woman belongs to this type, the child may be tested positive after birth, and as the child grows up, the antibody will be diluted and decomposed, and it will be gradually transformed into negative. To summarize, patients are advised to go to the STD department in time and actively cooperate with doctors for treatment.