I, like Curt have 2 twins, but at age 14. They can actually help out during recovery. I do not think there is ever a perfect time with regards to children. My concern as they got older, is that I would be missing the really active stuff, like riding bikes, unicycling, hiking, skiiing, and all the crazy stuff that we like to do as a family. I indeed, have missed about 2 years worth of soccer, biking, and other things because of the hips. Certainly, it would be rather tough if they were infants, because of lifting, chasing, cleaning,...but as Pat points out, it is a rather short period of time. I don't know how Gross's low bone density restrictions differ form the usual restrictions, but most surgeons recommend a long period of time, 6 months to year before resuming any heavy types of impact to the hip like running, soccer, skiiing,... I didn't have time for that anyway, when the kids were little. My preference would be to get it done sooner than later, at least the bad one.