I'm not sure it's a new thing. My mom had two stillbirths in the early 60's and both were issued birth certificates.
One was delivered at 7 months, one was full-term, but stillborn. Maybe it depends on the state??
I know when I had a miscarriage, the medical forms called my baby "products of conception".
Could that be any colder? At least give me 'fetus' or something that sounds human.