No telling. But I refuse to see how it's so important. I refused to get tested for it at all, because they didn't start that stuff till my third child. I told them, "Look, I did fine with no B Strep test the last two times. If I let you test me, and it turns out that somehow I have a little stupid B Strep, you're going to hook me to an IV and fill my poor body with ridiculous antibiotics that will eventually really just produce a stronger strain of B Strep. So why in the world would I do that? Go through all that trouble to worry about some little bug that we didn't give a hoot about yesterday?" I never found out, baby came out fine. .....