I would say that rising a kid is going to teach you many things you would never learn at school, and those social skills can make a difference in job interviews. If you're able to take care of a family then you certainly are a good team player.
Odds are it won't make a huge difference - everyone has a life to live outside of work. Even if it does cause some career stagnation, any decrease in your career because of having kids is going to be a good thing. Absolutely nobody gets old and then says, "I wish I worked more and spent less time with family."