Herpes simplex virus type 1 has a lesser effect on pregnancy and basically has no effect on the development of the fetus. Herpes simplex virus type 2 has a greater impact on pregnancy and can infect the fetus via the placenta or the birth canal, causing fetal malformations, preterm labor, miscarriage, stillbirth, and localized pox rashes on the skin and eyes. 1. Herpes simplex virus type 1 is mainly infected through droplets or close contact, generally has no effect on the fetus, but can be infected by droplets or close contact with newborns, causing gingivostomatitis. 2. Herpes simplex virus type 2 is mainly neonatal infection through the maternal reproductive tract, can cause intrauterine, birth canal and postnatal contact infection. Primary infection in pregnant women can infect the fetus via the placenta, causing preterm labor, miscarriage and stillbirth. If a pregnant woman suffers from acute-phase genital herpes, the newborn can be infected via the birth canal, causing localized pox rashes on the skin, eyes and mouth, and herpes meningitis. If a person preparing for pregnancy, pregnant women and women in labor are infected with herpes simplex virus, they should be treated under the guidance of a doctor.