@loopsdefruit while I 100% agree with you that attachment does not depend on genetic connection, I would be a bit wary of separating it completely from the physical bond the child forms with its gestational mother.
I have also worked in a field with children where attachment is important, and have seen first hand the gestational bond broken by the mother not properly meeting baby’s needs and caring for baby, and the affects of RAD in older children. So I know that a nurturing, properly attached environment is better than a poor but genetically close one.
However, the bond a baby has and the natural incentive to attach to the woman who bore it is undeniable.
In addition to having worked directly with adopted children, I have the benefit of having bonded with my own genetic and non-genetic children. There is no doubt the baby considers its gestational mother it’s true mother.
That is not to say the other parent doesn’t eventually create equal attachment with the child, but there is no denying the head start the gestational mother has (@excellenfish is bonkers for saying it’s genetics, no feminist analysis whatsoever)
I think with my children, preference had evened out after about a year, and then it’s like all children— they go through phases of preferring one or the other. I would actually say, anecdotally, that attachment to the non-gestational mother follows the same pattern as I see with involved fathers (that is, it takes time and patience despite the genetic relationship)
Nor do I think it matters in the debate of lesbian couples on birth certificates, because in lesbian couples the baby always stays with its gestational mothers. I think as women and feminist we would be remiss to discount the value of gestation as women, the value of gestión for the baby, and separating a baby from its physical mother does open the door for child safeguarding issues (which ARE NOT applicable to this discussion on lesbian body certificates, but would apply to a discussion on surrogacy).