Systematic Review on music interventions during pregnancy in favor of the well-being of mothers and eventually their offspring.

Mental health affects maternal well-being and indirectly the development of fetal brain structures and motor and cognitive skills of the offspring up to adulthood. Main objective is to find specific characteristics of music interventions that improve validated maternal outcomes. Randomized controlled trials (RCTs) and systematic reviews investigating music interventions during pregnancy were identified from the start of data sources up to December 2023 using MEDLINE, CENTRAL, or WEB OF SCIENCE. Using COVIDENCE two reviewers screened for RCTs with ≥3 music interventions during pregnancy which applied either Perceived Stress Scales (PSS), State-Trait Anxiety Inventories (STAI), Edinburgh Postnatal Depression Scales (EPDS), or blood pressure (BP) as outcomes. The revised Cochrane risk-of-bias tool (RoB2), the Checklist to assess Trustworthiness in RCTs (TRACT), and the reversed Cohen's d were applied. The review was registered via PROSPERO CRD42022299950. From 251 detected records, 14 RCTs and 2375 pregnancies were included. Music interventions varied from in total 3 to 84 active or passive sessions with either patient- or pre-selected music and a duration of 10 to 60 minutes per session. Thereby, 2/4 studies observed a significant decrease in PSS, 8/9 a significant decrease in STAI, and 3/4 a significant decrease in EPDS; BP was significantly reduced in 3/4 RCTs. RoB2 was "high" in 5/14, or "with concerns" in 9/14 studies. Stratifying the Cohen's d in 14 intervention arms suggested a big effect in 234/469 mothers on BP and in 244/489 mothers on maternal anxiety and a medium effect in 284/529 mothers on maternal anxiety. Small or very small effects on BP were observed in 35/70, on EPDS in 136/277, and on PSS in 374/784 mothers-to-be. We found a general positive impact of music interventions on maternal stress resilience. This was independent of the music itself but rather influenced by the frequency and empathy of performances. In how far music interventions may improve postnatal development and skills of the offspring should be increasingly evaluated with follow-ups to interrupt vicious epigenetic circles in times of global pandemics, violent conflicts, and natural catastrophes.

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