I'm in the same situation, due at the end of this month with our second and having our baby at Box Hill. I have already stated on my file that i will refuse the IV Antibiotics if my waters have not broken etc as i also think that AB given to a newborn unnecisarily is wrong as both myself and my daughter have had problems with AB's and i dont want this to effect my babys developing immume system. There is a 1 hour test for GBS that can be used in labour(unlike the standard 48hr culture one) but i'm havng fun trying to get my hands on one as the hospital dont have them but are willing to undertake the test during labour if i can source one for myself its called "ne IDI-Strep". You might like to look into it also.
The thing i don't like about this diagnosis is that its an infection that can come and go so i may not even have the infection at the time of labour. My midwife said that if i dont have the AB they will give the baby a heel ***** test after 6hours to test for a developing infection and then take action if required, my midwife also said that i will have a fight on my hands with the doctors about refusing the AB and said the way around this is to come in to hospital as late as possible or when my waters break, to have written on my birth plan that i understand and accept the risks involved by not have the AB and to be well informed.
i will add that my hubby wants me to have the AB's and i'm so unsure what to do that its keeping awake at night.
Good Luck and keep us updated!