"Since I'm the one responsible for carrying and raising the babies I have I believe I should have a say in when enough is enough."
When my OB said, "Enough! You are putting your life in danger, that was my clue."
The body cannot tolerate Multiple C-sections (old verticle incision, not the new procedure) without a possible rupture killing both mom and baby.
I have the same experience--3 c-sections. I asked my doctor if I could weather a 4th and he told me a story about when he was in medical school he watched a woman bleed to death from uterine rupture. I guess it's one of those few things that happen during pregnancy where the survival rate for mom and baby is just about nil.
After that, my husband decided to have a vasectomy--my doctor said tubal ligations cause a host of hormonal problems for women. It was a very painful decision and I still wish we could have more children, but not at the risk of my children not having a mother.