Does a petite body size make a natural birth more difficult?

A

Im 5'2 and pre-pregnancy weight was 105lbs. So on the petite side. My sister who is the same size as myself was told that she couldn't deliver naturally because of her petite size. There were also other factors that led her to have a C-section. Anyways, she is very adamant that I don't even attempt a natural birth, something about our hips being too narrow and it just not being possible. Any of you petite ladies had a natural delivery, no drugs used etc?