Teachers take care of kids all day. It would be no surprise to me if the last thing they want to do after taking care of and wrangling kids all day for work is to take care of their own kids. At least I wouldn't want to after teaching all day. Despite that, I know plenty of teachers who had kids like everyone else. My cousin's are both teachers and have 4 kids. My mom was a teacher and had 3 of us kids. A couple people I studied history with in college are history teachers and track coaches and they each have a kid by now. I help teach a computer science class and the main classroom teacher I with with has two kids. Really probably depends on the person and where they are in life.