GBS bacteria can be passed from you to your baby during labour. But this doesn’t usually cause problems, and most women who carry GBS bacteria have healthy babies. It is thankfully only in rare cases that GBS can cause serious illness and, even more rarely, the loss of a newborn baby.
Though it’s unusual, GBS is the most common cause of severe infection in newborns, particularly in the first week after birth (early onset infection). In the UK, about 340 babies develop a GBS infection every year.
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