Risk of Miscarriage and Occupational Activity: Systematic Review and Meta‑analysis
Summary
This systematic review and meta-analysis pooled data from 30 studies to assess whether occupational factors influence miscarriage risk. Fixed night work was linked to about a 50% higher risk of miscarriage, while rotating shifts, long weekly hours, prolonged standing, heavy lifting, and high physical workload showed only small increases in risk. In higher-quality studies, the associations for long hours and standing were weaker. Overall, the findings suggest modest risks, with the most consistent evidence for fixed night shifts.
Why It Matters For Night Shift Workers and Night Owls
For pregnant workers, especially those on fixed night shifts, this review indicates a modestly higher risk of miscarriage. Other job demands like long hours, heavy lifting, or standing for long periods may add small additional risks, though the evidence is mixed. The results highlight the importance of monitoring work schedules and physical demands during pregnancy. Employers and healthcare providers may consider individual adjustments—such as reducing fixed night shifts or very heavy workloads—to help lower potential risk. test
Notes
Covers shift work alongside other occupational factors.