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How do sexually transmitted infections (STI) affect pregnancy?

Diana Meeks
Diana Meeks on behalf of Sigma Nursing
Family Practitioner

STIs can cause many of the same health problems in pregnant women as women who are not pregnant. But having an STI also can threaten the pregnancy and unborn baby's health. Having an STI during pregnancy can cause early labor, a woman's water to break early, and infection in the uterus after the birth.

Some STIs can be passed from a pregnant woman to the baby before and during the baby's birth. Some STIs, like syphilis, cross the placenta and infect the baby while it is in the uterus. Other STIs, like gonorrhea, chlamydia, hepatitis B, and genital herpes, can be passed from the mother to the baby during delivery as the baby passes through the birth canal. HIV can cross the placenta during pregnancy and infect the baby during the birth process.

The harmful effects to babies may include:

Low birth weight Eye infection Pneumonia Infection in the baby's blood Brain damage Lack of coordination in body movements Blindness Deafness Acute hepatitis Meningitis Chronic liver disease Cirrhosis Stillbirth

Some of these problems can be prevented if the mother receives routine prenatal care, which includes screening tests for STIs starting early in pregnancy and repeated close to delivery, if needed. Other problems can be treated if the infection is found at birth.

This answer is based on source information from National Women's Health Information Center.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.