not understanding is not an excuse. there are some people who love having kids right and some who dont. its personal choice. some people are not into kids.
i just wanted to know the Islamic stance on this subject coz I know that it is encouraged to have big families, but what about people who don't want to , for whatever reason. Is there anything wrong with having only 1 child?
There are many reasons why one might choose to only have one child. Perhaps the parents are not into kids. perhaps for selfish reasons, such as they want to complete something before havign more kids, perhaps they would like to adopt a child and give a home to a chlid more needy.
if no-one knows off hand of any hadith or reference, then I'm guessing there is nothing wrong with it. I suppose different people have different feelings and Allah has made us all different.