I brought that up to the wife and she's good with that. I want 2 kids and not 1 kid more if I can help it and the procedure for women is much more complicated, risky, and has longer recovery. Once we have our two and they're up to toddler age I should be around 35 and I honestly want my kids to be of age to be out of the house before I'm 60. So at 35 I'm done unless there are extreme circumstances. However, like you said, we will probably freeze some of my boys just in case.