A 28-year-old female presents to clinic with complaints of bilateral hip pain. She states that she had recently given birth to her second child 2 weeks ago. She opted to give birth via spontaneous vaginal delivery. However, since the event, she has had pain in her hips when she walks. Osteopathic structural examination reveals a positive seated flexion test on the left. Palpation of the sacrum reveals the left sacral sulcus to be shallower than the right and ILA to be deeper on the left. Given the exam findings, which of the following is the most likely diagnosis of the patient’s sacral somatic dysfunction?