35 pregnant women w/ baseline & postpartum MRI-SIJ. 27/35 (77%) had SI bone marrow edema postpartum, 60% met ASAS definition of +MRI. 6 and 12 mos after, 46% and 12% still showed BM edema. Findings assoc w/ short labor & no epidural https://t.co/mhX3W96zR3