CMV - Leading cause of viral birth defects in the

CMV - Leading cause of viral birth defects in the United States and worldwide.

It's also the most common intrauterine infection in the U.S..
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An intrauterine infection, also known as chorioamnionitis, is an infection of the amniotic fluid, placenta, or membranes that surround the fetus during pregnancy. It can cause a number of complications for both the mother and baby, including:

Symptoms
Fever, uterine pain, vaginal discharge, and abnormally fast heart rate in both mother and baby

Complications
Acute neonatal morbidity, such as pneumonia, meningitis, and sepsis, as well as long-term complications like cerebral palsy and bronchopulmonary dysplasia

Brain damage
Intrauterine infections can cause brain damage to the fetus, which can lead to neurological problems, developmental delays, and intellectual deficits

Intrauterine infections are more likely to occur if the mother's waters break before labor. They can get worse quickly and make both the mother and baby very sick. Treatment includes antibiotics and giving birth to the baby as soon as possible.

Some factors that can increase the risk of intrauterine infection include: Smoking during pregnancy, Drinking alcohol or taking illegal drugs during pregnancy, Having a sexually transmitted infection, Having group B strep (GBS), and Having bacterial vaginosis (BV).