The Role of Proprioceptive Deficits, Psychosocial Factors and Inflammation in Pregnancy-related Pelvic Girdle Pain

Inclusion Criteria Multiparous Women: * Singleton pregnancy * Pregnant of second child or more than second child * No current PPGP or did not have PPGP during current pregnancy * Willing to provide written informed consent Exclusion Criteria Multiparous Women: * Pregnant for more than 16 weeks * Having current PPGP or having had PPGP during the current pregnancy * History of surgery/major trauma to spine or pelvis * Surgery/physical trauma to the lower limbs more than two years ago and currently still experiencing symptoms such as pain, instability, or stiffness * Surgery/physical trauma to the lower limbs less than two years ago * Specific balance or vestibular disorders * A medical diagnosis of a rheumatic condition or being under treatment for such a condition by a rheumatologist * Neurological abnormalities (e.g., peripheral neuropathy) * Uncorrected visual problems * Acute ankle problems * Being on absolute or relative bed rest due to pregnancy-related complications * Having (had) a formal diagnosis of a psychiatric disorder * Non-Dutch speaking Inclusion Criteria Nulliparous Women: * Age- and BMI- matched to pregnant participants * Nulliparous * Willing to provide written informed consent Exclusion Criteria Nulliparous Women: * Having low back or pelvic girdle pain at the time of inclusion or in the six months leading up to inclusion * History of chronic low back or pelvic girdle pain * History of surgery/major trauma to spine, pelvis and/or lower limbs, * Specific balance or vestibular disorders * Spinal deformities * Rheumatic disease * Neurological abnormalities * Acute ankle problems * (A history of) psychiatric disorders * Uncorrected visual problems * Non-Dutch speaking