Most of the threads on here are about people worrying about their only child being lonely and feeling responsible for producing a sibling for them. I just want to say "let yourself off the hook!!" There is nothing wrong with being an only child. My dd loves that she is the centre of my attention and in spite of the fact that she is a little spoiled by this she is thoughtful and kind and charitable and many other wonderful things and never feels like she has missed out on anything. I on the other hand have two younger brothers one of which I have very little in common with, I only see him at Christmas and the other has additional needs so I'm more of a carer type than a sister type. Everyone worrying about producing a sibling for their dc seems to have a very idealised view of how it will be in their head but it doesn't necessarily turn out that way. If you are desperately sad that you haven't had another child because you want to be a parent again then I can respect how heartbreaking that could be but don't torture yourself for not having provided your child with a sibling. I doubt they'll hold it against you.