u may read the article
http://findarticles.com/p/articles/mi_m0CYD/is_6_36/ai_72702919/
I haven't heard of a long uterus, but I was told I have a T-shaped uterus, which is smaller & that it's a risk to carry multiples. Low & behold, I'm pregnant with healthy twins. So, once we get over the initial shock that our bodies aren't perfect, there's always hope that we'll conceive & carry healthy babies :) Good luck!
We come in all different shapes and sizes. As far as I know a long uterus is not a problem.