Body Mass Index and Perceived Labor Control: Could weight stigma explain differences in birth experience?

Background: Individuals with a body mass index (BMI) of ≥ 30 kg/m2 experience weight stigma when interacting with the healthcare system. There is limited data on how weight stigma impacts patient's experience of obstetric care. This study aims to assess perceived control over the birth process and compare patients with BMI ≥ 30 to those with BMI < 30.

Methods: We performed a secondary analysis of a cross-sectional study of term patients. Postpartum, participants completed the Labour Agentry Scale (LAS), a validated tool to assess perceived control over labor/birth. Continuous LAS scores were compared between patients with BMI < 30 and BMI ≥ 30.

Results: There was no difference in LAS between those with BMI ≥ 30 and BMI < 30. When stratified by World Health Organization (WHO) class of BMI, those with BMI ≥ 40 had a significantly lower LAS scores than those with BMI < 30 (147 vs. 163, p = 0.02), however, this finding was no longer significant after controlling for length of labor and cesarean birth.

Conclusion: Only participants with the highest BMI experienced decreased control over labor, and this finding was no longer significant after controlling for mode of delivery and length of labor. Further research is necessary into how weight stigma influences birthing people's experience.