Disruptions in perinatal outcomes across Manitoba, Canada: before and over 2 years of the COVID-19 pandemic.

Authors

Laila Aboulatta, Kaarina Kowalec, Lisa M Lix, Mina Tadrous, Joseph A Delaney, Christine Leong, Jamie Falk, Silvia Alessi-Severini, Christina Raimondi, Katherine Kearns, Lara Haidar, Payam Peymani, Qier Tan, Sherif Eltonsy

Published in

BMJ paediatrics open. Volume 10. Issue 1. Jun 29, 2026. Epub Jun 29, 2026.

Abstract

The COVID-19 pandemic disrupted healthcare service utilisation, but evidence on its impact on perinatal outcomes is conflicting. We investigated the impact of the pandemic public health measures (eg, lockdowns, reduced healthcare access, altered health-seeking behaviour) on preterm birth (PTB), stillbirth, low birth weight (LBW), small for gestational age, caesarean delivery, breastfeeding initiation (BFI) and neonatal intensive care unit (NICU) admissions.
Using linked administrative health databases, we conducted a population-based study of pregnancies before (January 2008-February 2020) or during (March 2020-March 2022) the pandemic; for the latter period, they were categorised by exposure duration. We conducted interrupted time series analyses using season-adjusted generalised linear models, and analyses were stratified by income.
Among 222 636 pregnancies (190 694 prepandemic and 31 942 during pandemic), PTB rates increased from 8% prepandemic to 9.1% during the pandemic, with a 19.0% relative increase overall (p<0.01). In stratified analyses, PTB rose by 27.1% in the lower-income group (8.8% to 10.1%, p=0.01) and by 19.7% in the higher income group (7.3% to 8.2%, p=0.02); however, effect modification by income was statistically non-significant. Pregnancies 100% exposed during the first and second year of the pandemic experienced higher rates of PTB by 15.0% (p=0.01) and 11.6% (p<0.01) compared with the prepandemic period, respectively. The pandemic measures were associated with no changes in stillbirth (0.7‰ vs 0.61%; p=0.37) or NICU admission rates (8.3% vs 8.2%; p=0.69). LBW rates increased from 5.5% to 6.3% (13.9% relative increase, p=0.05). Pregnancies spanning the entire first year of the pandemic experienced higher rates of caesarean deliveries (24.6% relative increase, p<0.01). BFI rates decreased from 82.5% to 81.8% (3.9% relative decrease, p=0.01) compared with prepandemic, followed by a slight increase (p=0.02) during the pandemic period.
The COVID-19 pandemic measures were associated with increased PTB and caesarean delivery rates, particularly among pregnancies fully exposed to pandemic measures. Over the 2-year pandemic period, stillbirth, NICU admissions and BFI rates were stable.

PMID:
42373196
Bibliographic data and abstract were imported from PubMed on 30 Jun 2026.

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