What is GBS?

GBS is usually harmless in adults, but if you have it and pass it on to your baby during birth, it can cause serious complications, such as pneumonia, meningitis, or a blood infection. Because 10 to 30 percent of pregnant women have the bacteria and don't know it, it's vital to be screened. (The bacteria come and go on their own — that's why you weren't screened earlier in pregnancy.) If you're a GBS carrier, you'll get IV antibiotics during labor, which will greatly reduce your baby's risk of infection.