REALLY?!? You don't think that the eggs you've had since you were inutero don't deteriorate over time, your hormones don't slow down/change, your body doesn't age over time? For heaven's sake - I'm over 40 - I don't expect to have the fertility of a 25 year old.... lol
I has a c-section and anyone who has checked me was very happy with the scar, internally and externally. They found no scar tissue, other than at the incision site. There is still plenty of room in the uterus for implant ion other than the scar site. I haven't heard of any studies done on success rates for implantation after a c-section but I will look it up.
There are so many things that can go wrong... here's to hope!