I went to a birth centre and considered declining the test. I had a good chat to the midwife who was all for me declining it. I ended up having it though as she said if I was positive I wouldn't be classed as "high risk" and have to leave the birth centre and I wouldn't have the antibiotics pushed on me and was well within my rights to manage the labour in other ways. If I was negative then that would be on my record and I'd be left alone if I had to transfer to the main ward.

I'd have a talk about what your hospital's protocols are with a positive or negative result and see what works best for you.