I know this post is several days old, but I wanted to respond. After a loss at 16 1/2 weeks, I lost the next baby very early (about 5 weeks, completely unrelated to the reason for my first loss). I then went on to have a nearly flawless pregnancy with my next child, who is now an adorable toddler! I am pregnant again, and if all goes well, this will be my 3rd live birth. In my case, I learned the problem that caused my 2nd tri loss was a blood flow problem to the placenta, so my doctor had me start taking baby aspirin. (I don't know if that's made the difference, though.)
So yes, I have delivered a happy, healthy baby after a 2nd tri loss. I hope this helps!