Importance 

Pregnant women are exposed to both occupational and environmental noise during their pregnancy. The association between noise and adverse health outcomes is well known. Less is known about the relationship between noise and its effects on the embryo/fetus and pregnancy.

Objectives 

The purpose of the study is to review what is known about the effect(s) of environment and occupational noise during pregnancy on maternal and perinatal outcomes.

Evidence Acquisition 

Electronic databases (PubMed, CINAHL, and Embase) were searched from 1995–2023 with the only limitation being that the articles were in English. Studies were selected that examined associations between environmental and occupational noise and pregnancy outcome, maternal outcome, or perinatal outcome.

Results 

There were 233 articles identified. After reviewing all abstracts and selected full texts, 25 publications were used as the basis of this review. Multiple studies have been undertaken evaluating the effects of noise on embryonal/fetal growth, fetal development, maternal hypertension, gestational diabetes, and maternal anxiety and depression. The overall effects of occupational and environmental exposure on both fetal and maternal outcomes remain uncertain.

Conclusions 

Further high-quality studies are needed to determine the association between noise and pregnancy outcomes.

Relevance 

Even though this review suggests a relationship between noise and maternal/fetal outcomes, confirmation will require well designed future studies.

Target Audience 

Obstetricians and gynecologists, family physicians.

Learning Objectives 

After completing this learning activity, the participant should be able to explain how sound is measured, the thresholds of sound in children and adults, and exposure levels that result in hearing loss; describe the effects of exposure to noise during pregnancy and its effects on adverse pregnancy outcomes; and discuss the effects of environmental and occupational noise on the developing embryo/fetus.