Genital Herpes and Pregnancy Reassurance

When I tell a patient the diagnosis of genital herpes in the clinic, there is a question that comes out first, in a trembling voice, after a brief silence. "Me later on... is pregnancy and childbirth okay?" Every time I meet that anxious look, my heart grows heavy. It is because many people come in carrying a fear far greater than reality, owing to the inaccurate information floating around the internet. To put the conclusion first, the fact of being a herpes carrier does not block the path to becoming a mother. You only need to know accurately what to manage and when.

Genital herpes is a common infection caused by the herpes simplex virus (HSV). It is broadly divided into type 1 (HSV-1) and type 2 (HSV-2); traditionally type 1 is known to occur around the mouth and type 2 on the genitals, but recently genital infection by type 1 is also reported not infrequently. Both types have the characteristic that once they enter the body, they lie dormant in the nerve ganglia and reactivate when immunity drops.

So herpes is closer to a chronic condition to be "managed well" than the concept of being "completely eliminated." Usually there are no symptoms, but it may send a signal as blisters or tingling when your condition drops, such as around fatigue, stress, or before and after menstruation. The U.S. Centers for Disease Control and Prevention (CDC) STI treatment guidelines (2021) also describe herpes as a chronic infection managed for life, focusing on symptom control and reduction of recurrence frequency. In the clinic, accurately understanding just this one fact that it is "a manageable disease" considerably reduces vague fear.

Let me address the most commonly misunderstood point first. The mere fact that the herpes virus lies dormant in the mother's body throughout pregnancy does not in itself cause malformation in the fetus or raise the risk of miscarriage or stillbirth. The baby is protected inside the womb by the amniotic membrane and placenta.

Of course, a primary infection, in which one is infected with herpes for the first time during pregnancy, is a separate situation to view carefully, and in this case close discussion with the attending doctor is needed. But in most cases of being a carrier from before pregnancy or showing a recurrent course, the dormancy itself does not threaten the baby up to full term. So you do not need to spend day after day throughout pregnancy worrying "what if something happens to the baby." If you are curious about what tests are needed before pregnancy, you may also refer to the guide on pre-pregnancy tests.

So what should you be careful of? The key is just one thing: the moment of delivery. If there is a lesion at the moment the baby passes through the mother's vagina, that is the birth canal, into the world, it can be directly exposed to the virus. For a newborn with immature immunity, herpes infection is rare but can lead to serious problems including encephalitis, so this moment at least must be sufficiently guarded.

However, a balanced perspective is important here. Neonatal herpes itself is reported as a very rare event. The UK RCOG/BASHH joint guideline (2024) classifies neonatal herpes as a rare complication while making clear that the risk can be further lowered by delivery-timing management. In other words, since it is a matter with low likelihood of occurrence but potentially heavy outcome, it is right to approach it with "preparation," not "fear."

The risk of transmission to the newborn at delivery differs greatly depending on "when you were first infected." Synthesizing domestic and international materials such as those of the Korean Society of Genitourinary Infection, a primary infection acquired for the first time right before childbirth is reported to have a considerably high risk level, whereas a recurrence of a virus held from before pregnancy is reported to have a markedly lower risk. Even the same "herpes" means something different depending on the situation.

What this table suggests is clear. It means that rather than vaguely "I have herpes so I'm at risk," what comes first is accurately grasping, together with a specialist, which situation you fall into.

The steps actually looked after in practice for a safe birth are relatively set. You can see it as a process of changing vague anxiety into a concrete plan.

• Tell your attending doctor about your history. At prenatal exams, do not hide your herpes history; please be sure to tell. Only then can a safe birth plan be drawn up together from the start.
• Full-term preventive antiviral suppressive therapy. The American College of Obstetricians and Gynecologists (ACOG, 2020) and CDC guidelines (2021) present suppressive therapy with an antiviral of confirmed safety from around week 36 of pregnancy for pregnant women with a herpes history. This is reported to reduce recurrence at the time of delivery and the resulting possibility of cesarean section. RCOG/BASHH (2024) sometimes considers it from an earlier period depending on the situation.
• Lesion check on the day of delivery. If there is no active lesion on the vulva at the time of delivery, vaginal delivery is often possible, and if there is an active lesion or prodromal symptom, cesarean section is recommended for the baby's safety.

The type, dose, and start timing of the medication vary by gestational week and individual condition, so they must be decided through a medical visit. Antiviral suppressive therapy is reported to be used relatively safely during pregnancy, but since there can be individual differences, self-judgment is not recommended.

In the clinic, what expecting mothers diagnosed with herpes carry more heavily than the medical risk is, in fact, guilt and shame. In my clinical experience, the weight of this emotion often instead hinders recovery and management. Herpes is a common infection, and being a carrier does not mean your fault or inadequacy.

Herpes is a chronic condition that is a concern, but it is not a disease that makes you give up your life or precious dreams. With these three things—everyday condition management, regular gynecologic checks, and honest communication at the delivery-planning stage—it can be managed well enough. If recurrent gynecologic symptoms also concern you, the guide on the causes of recurrent vaginitis or the guide on the interval of gynecologic visits may also help.

Rather than worrying alone and suffering, sitting face to face with a specialist who has accurate information to check your situation is the fastest path to reassurance. If you have questions, please use a comfortable consultation about pregnancy and herpes anytime. I hope you take heart.

Written by: Lee Dong-hee Director · OB-GYN specialist · View doctor profile

First published January 17, 2026 · Last reviewed May 30, 2026

References: ACOG Practice Bulletin No. 220 Management of Genital Herpes in Pregnancy (2020), CDC STI Treatment Guidelines (2021), RCOG/BASHH Joint UK Guideline for the Management of HSV in Pregnancy and the Neonate (2024)

This article is intended to provide general health information and does not replace individual diagnosis or treatment. If you have symptoms, please consult through a medical visit.