March 12, 2026 · American journal of obstetrics & gynecology MFM · DOI: 10.1016/j.ajogmf.2026.101930

Don't Go To The Hospital in July? Not True in Obstetrics

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The authors aimed to investigate whether the "July Effect," characterized by increased adverse patient outcomes due to inexperienced medical residents, affects severe maternal morbidity (SMM) and maternal mortality during delivery hospitalizations at teaching hospitals. Their analysis of over 15 million deliveries revealed no statistically significant differences in SMM, potentially preventable SMM, or maternal mortality risk across different quarters of the academic year. Consequently, the study concludes that the influx of new residents in July does not negatively impact maternal health outcomes.

Alicia M Davidson, John J Byrne, Holli B Ott, Robert M Rossi, Heather N Czarny

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Don't Go To The Hospital in July? Not True in Obstetrics

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