A baby with GBS will go down very quickly usually with in 2-3 hours of birth. a sepsis screen takes atleast 24 hours to come back as they need to grow the bugs. many drs want babes to start ABs before that result is back. just as if you dont have GBS the midwives would be taking temps and doing checks on baby through out the 24 hours. PLUS you will be staring at the babe for the next 2 yrs you will notice if babe isnt coping well with life outside.
some things to think about, if you dont rupture your membranes until birth there is little chance of transmission. so dont consent to ARM, limit VE's if you do rupture your membranes as they are then pushing the bacteria up into/through the cervix.