Thanks for comments. They are interesting and certainly given me food for thought.
In many ways, whether I am in a relationship or not, it would come down to using donor sperm. So I genuinely wonder, those who's issue appears to be with the child "not knowing where they came from" if they would have an issue if I was in a relationship - with a woman? I don't mind either way: people are obviously entitled to think whatever they want - but as a gay woman, you can see that I know other gay women who have babies and who are perfectly normal, happy, stable families.
Perhaps I'm expressing my point clumsily, but the fact is we can't make everything perfect for a child, can we? Only the things within our control ... I can't control who I am, as in my heart of hearts, that's gay! And I could wait and see if I met a lady - but it sounds like the people who are voicing objections would object anyway.
I find that interesting, as I don't know if people would have made similar responses if I'd done an "AIBU to have a baby with my girlfriend?"
What I'm saying is, is it being single, or using donated sperm?
Donor sperm is a valid and acceptable means to having a family. It is used primarily by same sex and single women but also by husband/wives who have no sperm count, or if there is the danger of passing on a hereditary disease. I can't imagine anyone objecting to that scenario, somehow.
As with most things it is how you deal with it. No huge surprises, just matter of fact - you were loved, wanted and this is how you came into the world.
Two parents is the convention but I am honestly surprised that those "anti" here seem to have a problem with the idea of donor sperm rather than me being alone? Do you also have issues with blood donations? Kidney transplants? I bet you don't! :)