We just had a baby girl UC 11 days ago in California, got her birth certificate on the 9th day.
Proof of pregnancy, which can be a health department pregnancy test or an exam after the birth by an OB or mw if you didn't get the proof in time.
ID for you and partner, witness
A utility bill proving your address
Marriage cert or paternity slip if you want partner name on certificate
The firms they offer for the birth certificate
That is all. Pku is...