Do I want more kids?

A question that has presented itself to me many times since I got engaged has been whether or not I want to have more kids. A big part of me says yes. I have a brother and two sisters. I love having a big family. Right now, I have two kids and my fiance' has one. I would like to have two more, but good Lord...that would make five kids! Do I really have the patience to take on two more kids? Don't get me wrong, I love babies, but having them is so exhausting. I think I could pull off having one more without losing too much of the hair I have left, but I don't know about two. I guess we will just have to see.