I tested +ive with DS and was given IV antibiotics. Like everyone has said it is very common, and i can see why if your waters broke they may want to sped things along, but not sure why the antibiotics wouldnt keep working. Strep B although very common is life threatening to babies we just had a court case very recently at a WA hospital because a baby died from strep B, when a simple dose of antib's would have prevented this and although i dont want to scaremonger it is such a preventable thing, why would you take a risk?