Never heard of such a thing, and I am in the US. With my first, I had two nurses (one night, one day) who I saw every day (3 day stay) and who were fabulous and amazing. If it had occurred to me, I would have done it. With my second, I never had the same nurse twice, it seemed, and they were overall not that great (except for the nurse in the recovery room - she was one of a kind!). And were very grumpy when I asked them to wash their hands prior to touching the baby (hospital upon check-in had handed out a sheet telling patients to request this!).