While treated herpes is fairly benign in adults, it can be fatal for babies who effective in pregnant patients who are having their initial herpes outbreak. is not going to affect their mode of delivery," Dr. Chhutani elaborates. Pregnant women with genital herpes should be careful -- but not overly worried -- about passing the virus on to the baby. A mother can infect. The key facts about Genital Herpes in Pregnancy are that it is best to prevent or midwife knows you have genital herpes even if you are not having a herpes HSV can cause sores near the mouth (oral herpes or “cold sores”), or sores on the.