I also have a bicornuate uterus of equal size and am 10 weeks pregnant. I've scoured the internet for information but there are so little studies done on our condition and most of the studies have such small numbers you have to wonder about the accuracy. My pregnancy is also on the left side. I actually had ivf and the FS implanted on the left so I was expecting that. The second trimester is the scary part for us so I'm just keeping my fingers crossed and hoping I'm one of the lucky 50% whose bicornuate pregnancy makes it.