I was trying to be succinct but ideal , as stated in the earlier post, refers to conditions I can control. Maybe, a better description would be, conditions meeting my criteria. Like marriage and stable housing (property ownership or social housing). Unlike people who have such a strong biological urge, they want kids no matter what. If I was single or lived in private rented I wouldn't have kids. No issue with others who do, I just wouldn't.
If I already had them and life changes, well, I cannot control that. But I wouldn't enter into such a situation knowingly.
I'm ND , we tend to marry other ND people and evidence shows a high degree of heritability. So I was never under any illusions of having an 'easy' child. Adoption trauma would be no different. In any case, SEN, illness , birth injuries are in the category of uncontrollable things.
There are very specific reasons why I won't consider IVF but I don't need to make this post longer so I'll stop there.