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Poster Session 2

(552) Does Day of Delivery Matter? Obstetric, Maternal and Neonatal Outcomes in Term, Singleton Weekend Births

Thursday, January 30, 2025
4:00 PM – 6:00 PM  

    Submitting Author and Presenting Author(s)

  • Marlee Hirsch, MD (she/her/hers)

    Northwell Lenox Hill Hospital
    Lenox Hill Hospital, New York, United States

    • Coauthor(s)

  • EL

    Erez Lenchner, PhD

    Biostatistics and Data Management
    New York University Rory Meyers College of Nursing
    New York, New York, United States

  • Ashley Zimmermann, MD (she/her/hers)

    Resident
    Northwell Lenox Hill Hospital
    New York, New York, United States

  • Moti Gulersen, MD, MSc

    Assistant Professor, Obstetrics and Gynecology
    Sidney Kimmel Medical College of Thomas Jefferson University
    Philadelphia, Pennsylvania, United States

  • Eran Bornstein, MD

    Vice Chair of Obstetrics
    Northwell Lenox Hill Hospital
    New Hyde Park, New York, United States

Objective:

To determine whether obstetric, maternal, and neonatal outcomes differ between weekend and weekday deliveries in the contemporary United States (US).

Study Design:

A retrospective analysis of the Centers for Disease Control and Prevention’s Natality live birth database (2016-2022). The inclusion criteria consisted of term (37 0/7 - 40 6/7 weeks), singleton pregnancies. The study group comprised of births occurring on the weekend (Saturday or Sunday) while the comparison group consisted of those occurring during the weekdays (Monday through Friday). Obstetric, maternal, and neonatal outcomes were compared between the two groups using Pearson’s chi-square test. Results were presented as odds ratios (OR) with 95% confidence intervals (CI). Statistical significance was defined as p-value < 0.05.

Results:

Of the 22,355,756 live births analyzed, 4,598,349 (20.6%) births occurred on weekends. The prevalence of weekend births and the ORs based on different maternal and neonatal outcomes are presented in Tables 1 and 2, respectively.

Conclusion: Based on this large contemporary US database, weekend births are associated with higher rates of maternal intensive care unit (ICU) admission, 3rd and 4th degree perineal lacerations, maternal antibiotic use, uterine rupture, neonate less than 2500g, assisted ventilation, 5-minute APGAR score < 7, and neonatal ICU admission. However, there was a lower risk of primary cesarean section on weekends than weekdays. This information can be used to guide providers into stratifying higher risk deliveries on weekdays when planning is possible.

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