Ooh so I just read the Ramzi's thingo. Well, I know what side DS implanted on, as I had surgery at 6 weeks pregnant from suspected cornual ectopic. He was on the left side, as I was expecting to lose the left portion of my uterus in the surgery, and I also ovulated from the left side too, so he implanted just under the fallopian tube on the left.
It says: 97.2% of the male fetuses had a chorionic villi/placenta location on the right side of the uterus
I know for a fact that DS was on the left, so there you have it I know they aren't saying 100%, but I can tell you what happened to me anyhow.
Obviously the doctors were wrong too, as DS is here with us today