If your screening test for GBS comes back positive, if you have had GBS found in your urine, or if you’ve had a baby previously infected with GBS, treatment with intravenous (IV) antibiotics is recommended once your labour starts or your water breaks. If you haven’t had a GBS screening test once you go into labour (for example if you are in preterm labour), it is also recommended that you be treated with IV antibiotics. This treatment is important because it prevents the bacteria from being passed to your baby during delivery.