A 9-Oqus-camera marker-based motion capture system (Qualisys Medical AB, Sweden) and an 8-Micus-camera markerless motion capture system (Qualisys, AB, Sweden) was used to capture kinematic data during seven upright birthing positions. Healthy_female_18+_years_of_reproductive_age_(<49_years),_free_from_injury,_pain,_and_illness,_with_no_medical_condition_that_limits_ability_to_perform_positions_included_in_study.