Backgound: Infection with B19 during pregnancy can lead to bad outcomes such as spontaneous abortion, fetal death, nonimmune fetal hydrops and congenital malformation.

• 背景：妊娠合并B19感染与流产、胎儿死亡、非免疫性胎儿水肿和先天畸形等异常妊娠结局相关。