I think in the interest of keeping the most useful information, birth certificates should be required to list the name of the people who gave the egg and sperm. If they want to have additional names, that's fine. If they want to have a second, non-official document, that's fine.
But when the kid is 25, and we discover the cure for something, but it requires cells from a parent, we'll feel pretty stupid knowing that for the sake of PC we sacrificed these children's chance for treatment.
Do adoptees' birth certificates always list the biological parents? I thought that many don't, and if the birth parents don't want their identities known to the child they have that right.