How can Bacterial Vaginosis (BV) affect pregnancy ?

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Pregnant women are at increased risk for BV because of hormone changes that happen during pregnancy. If you have BV during pregnancy, your baby is at increased risk for premature birth and low birthweight. Premature birth is birth before 37 weeks of pregnancy. Low birthweight is when your baby is born weighing less than 5 pounds, 8 ounces. Being born too early or too small can cause health problems for your baby.
BV also can cause pelvic inflammatory diseases (also called PID). PID is an infection in the uterus that can increase your risk for infertility (not being able to get pregnant).
BV is also associated with a two-fold increase in risk of preclinical pregnancy loss, sometimes called a chemical pregnancy, following IVF. BV is also associated with increased rates of human papillomavirus (HPV) and HIV infection. For women with BV present during pregnancy, there may be an increased risk of miscarriages, preterm birth, and low birth weight complications for the newborn, as well as postpartum infections.