Observational StudyA Research Study Exploring How Musculoskeletal Function and the Autonomic Nervous System Relate to Visceral Pain in Women With and Without Dysmenorrhea (Painful Periods).

Inclusion Criteria: Non-pregnant women, not taking hormonal birth control, between the ages of 18 and 36 who report regular menstrual cycles are eligible for the study Exclusion Criteria: Participants will be excluded if they are currently pregnant or, have given birth within the preceding six months, are breastfeeding, or are undergoing in-vitro fertilization treatments. Exclusions also include those who have had abdominal, lumbar, or pelvic surgery within the preceding 12 months, suffer from a chronic pain condition, have an active genitourinary infection, are incontinent of bowel or bladder, or have been diagnosed with prolapse of a pelvic organ, severe labral pathology, femoral acetabular impingement (FAI), interstitial cystitis, endometriosis, pelvic inflammatory disease, irritable bowel syndrome, or other pelvic pathology. Participants reporting a cycle length of less than 28 days or longer than 35 days, those with a history of sexual assault, and those who are anovulatory without hormonal BC or amenorrheic will also be excluded.

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