1.通过胎盘直接传播给胎儿:尤其是在早期妊娠阶段,孕妇的免疫反应受到抑制,机体的免疫能力降低;从胎儿的角度来看,妊娠早期正值胎儿器官形成的敏感阶段,容易造成胎儿发育异常。尽管感染之后可以不出现 1. Direct transmission through the placenta to the fetus: especially in the early stages of pregnancy, pregnant women immune response is suppressed, the body’s immune capacity decreased; from the fetus point of view, early pregnancy coincides with the sensitive stage of fetal organ formation, likely to cause fetus Abnormal development. Although the infection may not appear