Thanks girls, for all the great information, really appreciate every single input! The standard protocol here in North Carolina apparently is 38 weeks scheduled C-section. We are still doing the research on our options.
Why C-section? This is, in my mind, better for the babies than having them induced. We don't feel comfortable taking Pitocin and Epidural, since it may cause the fetuses go into distress, with a C-section there's less drug going into their brain.
A home birth will be ideal for us if we were carrying a singleton, we love the idea of bringing them to the world w/o cold lights in a surgical environment (Documentaries: The Business of Being Born & Orgasmic Birth) and I believe for a normal healthy woman, she can absolutely be in control and let nature take its course. However, lay midwives (CPMs) are prohibited from practicing in North Carolina, so that option is taken away, we did find one CPM in the area and we will be talking to her to see whether she can attend the birth as a doula - so maybe eventually we will be able to have an IV-free, drug-free real natural birth at the hospital (I am sure we will have to put up a fight for it) but I am not afraid of it - they have to get our signature to give us drugs so we just won't sign it.
The failing placenta is a concern and my OB mentioned it as well, I will consult the ultrasound specialist and see whether he will be able to closely monitor the placenta after 38 weeks, since my last ultrasound, at 20th week, showed the two placenta started to fuse, so if it does fail, we may lose both of them (they are fraternal and in their own sacs).
Thanks again, very much!