With my first, I had horrible pains in my thighs all throughout labor, she was posterior as well and I assumed that was what was causing the pain. The pain radiated down the sides of my hips and into my thighs. My second was born via c-section so I was not able to experience labor with him. Interestingly enough, I just had a missed miscarriage and after waiting a few weeks, took cytotec. Cytotec brought on strong contractions, and once again I felt very painful contractions throughout my thighs.