Two things. Firstly, this whole discussion should be child centred. This discussion, in my opinion, is about naturally conceived children and children conceived through unnatural medical intervention and how they both should have the same rights - the right to know the truth about their biological parents, to have relationships with them if possible, to be able to trace their genealogy and the right to have an accurate recording of who they themselves are on their birth certificate- whose womb they came from and whose genes they carry - their genetic mother and father.
Secondly, since it is pretty new to use donors and unfortunately, the ethics surrounding donor gametes to create human beings has not been considered up until this point in the rush to meet and exploit adult demand and scientific curiosity, it means that these things need to be sorted out asap. Because if not now, then when?
The birth certificate should continue to have the mother who gave birth, without question, this is key for identifying who an individual is, but where a donor egg has been used, I believe there should be an additional section of the birth certificate to clarify this, for the sake of the child, and to have the name of the genetic mother, (although this woman would not be the ‘legal mother’) written there. This would be the same for all mothers who have used donor eggs, of all sexualities.
I don’t believe people who are neither genetically related or who have not given birth to the child should be on the child’s birth certificate. In the case of using donor sperm, then that person should be named in this new optional ‘donor’ section, I am imagining, as the genetic father.
Now, because the nature of a heterosexual couple conceiving a child naturally means that a woman can deceive a man about his paternity or a man can lie about paternity, it means there is a loophole for heterosexuals, when registering a birth, which enables couples to deceive or lie about the paternity of the child if they choose to, without compulsory paternity DNA testing, for registering births. I don’t believe that there should be compulsory testing. People should continue to be trusted to be truthful.
The fact that nature and biology enables heterosexuals to deceive about paternity when registering a birth, if they choose, this should not be framed as a ‘right’ for heterosexuals to fabricate and deceive on a birth certificate, which lesbians should also have an ‘equal right’ to. The goal is for the truth and accuracy of the child’s identity. The child’s rights are paramount.