BackgroundDysfunctions related to pelvic floor muscles such as urinary incontinence and pelvic pain are common among pregnant and postpartum women. With properly functioning pelvic floor muscles, it is possible to prevent these dysfunctions. Still, shared understanding about effective exercise interventions is missing. The aim of this review of reviews was to form a summary of the existing evidence about effective exercise interventions on pelvic floor muscle function of pregnant and postpartum women. MethodsNine databases were searched by June 12, 2020. PICO was used to define the eligibility criteria. Population: pregnant or postpartum women, interventions: activity-based interventions aiming to affect the function of pelvic floor muscles, comparators: waiting list or usual care, outcomes: disorders concerning pelvic floors muscles, study design: systematic reviews and meta-analysis. Screening and quality assessment were conducted by two researchers separately. The data were extracted and analyzed narratively. ResultsAltogether 20 systematic reviews reporting findings from 147 original studies were included. The methodological quality of the included reviews was mainly good, overall scores varying from 6/11–11/11. The results showed it may be possible to reduce low-back and pelvic pain as well as the severity of pain with exercise interventions during pregnancy but no association with odds of low back and pelvic pain during the postpartum period were found. With prenatal exercise interventions, it is possible to decrease the risk of urinary incontinence during pregnancy and the postnatal period, but the differences between the control group and the intervention group seem to vanish in the late postnatal period. The results were carefully optimistic within postnatal exercise interventions that decreased pelvic pain, reduction in vaginal bulging and pelvic organ prolapse, but more research is needed. ConclusionsOverall, the level of evidence was low. It seems that with exercise interventions it could be possible to prevent and provide care for the disorders of pelvic floor muscles to some extent. However, more high-quality research is needed to support decision making in the health care systems and to get evidence-based knowledge guiding health professionals working with pregnant and postpartum women.