if genetic parenthood had to be recorded on birth certificates I think it could be very very dangerous for children and women at worst and highly intrusive on several people’s lives at best. Think about in how many situations you have to show a BC- they are used as an identity document throughout your life. Why does the genetic truth need to be revealed that many times to all those people? Is there a known benefit?
Weigh that up with the potential harms. We don’t live in a society that is ready for that and we can’t be sure that key individuals in the child’s or mother’s life or society in general won’t discriminate (or worse) against children or their mothers, because of that genetic parenthood being known.
The fact that unmarried women can omit the father from the birth certificate entirely (unless he forces his way on to it via a court order) and also the legal presumption of ‘the child of the marriage’ while rooted in a load of old patriarchy, in effect protect women and children where a publicised genetic truth could make them highly vulnerable. (Including where donation was involved).
Just because we now have easy access to genetic truth does not take away that vulnerability in lots of children’s and women’s circumstances.
This does not mean that we shouldn’t be open with kids about their genetic origins where they can be known and where it is safe to do so. There is absolutely everything right with telling kids the truth from an early age so they grow up always having known the truth (and don’t somehow discover later and then feel needlessly lied to.)
But let’s recognise that genetic information won’t be right or safe in all families to be revealed. So then let’s keep the law to a protective default on the birth certificate of not covering genetic parenthood, to maximise the safety and well-being of women and children.