Q&A: Should I have a hysterectomy?

I am not sure who to direct this question to so here goes. In all the females on my mothers side, there are only two who have not had hysterectomies: my cousin and myself. I am expecting my fourth (and, if I have my way, last) child in September of this year. I was wondering if I should go ahead and set this up to be performed or wait until I start having all the major medical problems before I have the procedure done? I am 31 years old. My non-pregnant weight is between 150 to 165 pounds and I'm usually in good health. I have an 11-year-old, a 10-year-old, a 2-year-old and am now four months along.

I didn't have any problems with my first two. With my last I had placenta previa, had to be induced and then my water had to be broken; with this one I have had several bouts with clots, spotting and some light bleeding, which I'm told is normal because the baby appears to be fine. If I should not have the procedure done at this time when would be right? What would you suggest for effective sterilization? Any other infomation would be greatly appreciated.