M.H.
Hi Madelon,
You've covered a lot of information so I won't repeat it but I did want to add something that you didn't mention. Women that have their tubes tied have a higher risk for cancers. (Men and vasectomies as well.) Typically childbirth is good for the body as it is truly cancer prevention. If you talk to an old, old doctor that has been practicing before most people discussed birth control, they'll eagerly tell you that childbirth is a great immune booster.
Just another perspective...
M.