Yeah, its sad.

The woman's womb would have to disagree with you. Like I said, you can wait, but would it be better for the kids health to have him at a younger age which has less probably of something going wrong?

I think the only thing that does have a time limit is women having kids. You can do it at 40 and above, but should you do it? Are you willing to wager the health of a child to have kids later?

Only thing I can think of right now that has a time limit.