Better births: Why all-female obstetric teams achieve the best outcomes
The gender makeup of a delivery room team could be a literal lifesaver. By analyzing data from 2.5 million births, researchers discovered that the way «Lead» and «Assisting» physicians interact significantly influences maternal safety during high-stakes medical emergencies, according to a new study published by the National Bureau of Economic Research (NBER).
The study’s central finding is a stark «partisan» divide in performance based on gender mix: female-only teams achieve the best maternal outcomes, while male-only teams have the worst. Specifically, the researchers found that severe maternal complications are 15.8% higher in male-only teams compared to female-only pairings. Notably, within mixed-gender teams, female-led teams performed significantly worse than male-led ones, experiencing complication rates roughly 10.8% higher than all-female teams.
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These disparities cannot be explained by patient medical risk, physician skill, or individual clinical preferences. Instead, the authors argue that gender norms directly shape how teams communicate and make decisions. Same-gender teams appear more effective at collaborating and incorporating member preferences into cohesive choices.
Notably, while male-only and mixed-gender teams often default to C-sections — described as the «path of least resistance» in stressful scenarios — female-only teams uniquely resist this trend, which likely contributes to their superior performance.
Furthermore, the study highlights a lack of resilience in female-led mixed-gender teams when facing challenges such as high hospital strain or limited prior collaboration. This vulnerability may stem from the fact that female leaders oversee male subordinates in a way that inverts traditional leadership norms, potentially introducing interpersonal frictions that hinder performance during emergencies.
Strikingly, the research also uncovered a major finding regarding racial equity: female-only teams were the only team type to show no racial disparity in maternal outcomes. They achieved the lowest complication rates for Black women, while male-only teams exhibited the largest racial gaps and the worst outcomes for Black patients. The researchers conclude that improving hospital performance requires addressing these deep-seated social norms through inclusive leadership training and team-building exercises rather than merely incentivizing individual behavioral changes.
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