I was tested in hospital with my first bubs, mainly I think because my waters had broken at 31wks so they were trying to get as much info as possible in regards to infections. Just so that they were aware of what was around when bubs was born, I tested positive but was told it wasn't anything bad as lots of women have it & don't even know it. They told me what would happen if I went into labour, that I would have a drip with antibiotics in it & bubs would be given antibiotics as well after s/he was born. As it turned out bubs wasn't affected as he was born by emergency c-section a week later at 32wks.