It is such a personal decision. All I can do is share my experience and decision making rationale.
i am in a SS relationship and therefore faced the same options , albeit without the trauma of infertility.
I knew I would not countenance donor sperm when it was donated anonymously because I did not think this was fair for the child and the importance of their identity and biological heritage. (I am a Social Worker). Nor did I want a known donor as an involved third parent. In my early thirties, the law changed to enable children to be given details of biological donor and siblings at 18 and 16 respectively, and at this stage, from an ethical perspective I felt comfortable with this. I recognised that this could result in difficulties / distress for our child, but I believed that we could overcome this with support, love, openness and so on.
My wife has her own decisions to make as the non bio mum; she understanly was anxious that a child would not consider her a ‘real’ parent - but she wanted children and didn’t want to carry .
we used the London Sperm bank - again , for some reason I didn’t want to use the cheaper European ones that provided more information - I wanted a UK based donor. As soon as I was pregnant (third attempt), we purchased more sperm so that hopefully, a sibling would be a full sibling and they could share the journey to make contact with their biological donor should they want to.
My wife’s anxieties were unfounded; she adored our son and they are far closer then I am to him! They share interests, humour, mannerisms and so on, although he looks like me. Our second child is his full sibling.
We had kids books about donor conception, same sex parents, different types families and so on. It is all they have known. We have answered all questions honestly and they both know that we are completely supportive about them finding their donor either one or both. Neither are interested at the moment (both teens) - but I expect it will probably change at some stage. (I would love to meet him because I am nosey , plus I want to thank him for gifting us two amazing humans! )
As an aside, a good friend has a daughter from egg donor conception, and she opted to sit her down and tell her at 10, which did not go well. Early openness and just being matter of fact and relaxed about it is definitely my preference - albeit we couldn’t exactly hide it! 😂😂.
Adoption was not for me. I have huge respect for adopters - I had worked for 15 years in child protection and adoption and as such, was very involved in the complexities and likely trauma the children had faced. I already held trauma from the amount of children who had been through awful things I had removed and placed for adoption. Subsequently, I worked in post adoption disruptions, so my view was coloured and I knew that I do not have the incredible skills that our adopters had. But, saying that, I know a lot of people that have adopted children and have had amazing experiences and it is just sad that the nature of my work meant that I worked with those at the extreme end of the spectrum.
So that is my story and thought process.
There is no wrong decision. And any child will be blessed to have such thoughtful parents who will love and support them.
Do keep us posted!