C.W.
I'm going to respond to the vasectomy question, not being an expert, but at least having some experience. My youngest is 11 and 10.5 years ago my husband had a vasectomy at my request. It's common for women to downplay the pain (especially since a vastectomy usually follows childbirth) but it is painful for several days. I don't know about precautions or risks, but it certainly worked for us. To me, with the childbirth and all, it seemed like a reasonable sacrifice for him to make. It has not, I repeat, NOT affected his sex drive or his "functioning" and he is a man now past 50. I think the decision for you is whether you are meant to be parents of six or seven children (or more??) and when. I think you will know. I applaud you. I only have two and knew that was enough for us.