Hey again Julie! I was just thinking about your question, about whether having a posterior baby put more strain on your body, and I'm pretty sure it's actually the other way around. The relaxin of pregnancy most likely made your body twist a little bit (it probably already was slightly, and pregnancy made it worse.) That changed the shape of your pelvis, made your back, hips and knees shift and compensate, and didn't allow your baby to get into optimum position for birth. It also most likely contributed to the painful labour. Having proper pelvic alignment is very helpful for an easier labour.