I'm not a nurse yet, but I was in your exact situation. Don't feel selfish for having your own dreams. You will be a happier person and better mommy if you do things for yourself too. I'd flirted with the idea of going to nursing school for years, with the intention of then working in L&D. What time you decide to go back to school is really such a personal choice. I know some moms who went back when their kids were babies(under three) and were happy to get it out of the way while the kids were young. I know others who waited until all their kids were in grade school or even longer before going. It depends on what works best for your family. Though, I can't imagine having a newborn in nursing school! I think if being a L&D nurse is what you REALLY want. Then you should go for it! I am, I know I will most definitely have to work in other areas first. You may not be as interested or feel as excited working in other fields but you would gain invaluable experience. And the eventual pay off of landing that dream job in OB would mean that much more. If it is what you really want, then let nothing get in your way. Life is too short! Good luck!