My sister and I were discussing our birth experiences today and she mentioned that after I had my caesarean our OB was talking to her and said that neither of us would be able to have a vaginal birth. My sister also had a caesarean delivery by the same OB. What he said was that our pelvis' are asymetrical. Arched on one side and flattened on the other. I was informed before my c-section of my condition. However, I never knew that my sister also had this condition. Interestingly, my sister's pelvis is arched on the opposite side that mine is arched. I have research all over the web for a diagnosis and possibly a surgical treatment so that I may be able to have a VBAC. I have only gotten results that lump most deformities into one catch-all diagnosis. Since my sister and I share this deformity I can only assume it is congenital. Neither of us have experienced any trauma. Our mother gave birth to us vaginally and our maternal and paternal grandmothers gave birth to multiple children vaginally. I would really like to find out what this is and what the causes and treatment are. Thank you for your responses in advanced!