A groundbreaking study published in JAMA Network Open on April 22, 2026, sheds new light on the work patterns of physicians during pregnancy, parental leave, and their subsequent return to the medical workforce. Conducted by researchers from ICES and Unity Health Toronto, this observational study meticulously analyzed billing claims data from nearly 4,000 physicians who experienced over 5,900 pregnancies in Ontario from 2002 to 2018. The research reveals nuanced shifts in physician workload across pregnancy trimesters and highlights specialty-based variations in postpartum return-to-work timing—critical insights with far-reaching implications for healthcare systems and policy development.
In an unexpected finding, physicians experiencing pregnancy did not demonstrate a uniform workload decrease throughout gestation. Rather, the data indicated that workloads either remained stable or actually increased during the first and second trimesters. This phenomenon was quantified as an approximately 12 percent rise in days worked during these periods, compared to pre-pregnancy baselines. Physicians averaged between 43.5 and 67 working days over a 14-week pre-pregnancy period, which increased to roughly 46 to 70.5 days per trimester in the initial two trimesters.
This counterintuitive increase challenges common assumptions about physician work behavior during pregnancy. Dr. Andrea Simpson, an obstetrician-gynecologic surgeon and senior scientist at ICES, interprets this pattern as a strategic adaptation—physicians may anticipate the need to step back later and hence carry a heavier load earlier. The necessity to equitably share on-call and overnight responsibilities within group practices likely reinforces this front-loaded work schedule. Essentially, many pregnant physicians appear to “pay the price” upfront by intensifying their workload intensity in early pregnancy to compensate for eventual reductions.
Corroborating this interpretation, overnight work shifted similarly, with increased hours in early pregnancy followed by a substantial decline in the third trimester. The third trimester workload dropped sharply to between 27 and 43 workdays, reflecting physiological limitations and heightened health considerations necessitating a reduced clinical schedule.
The study further dissects return-to-work patterns post-childbirth, unveiling significant variability across specialties. On average, physicians resumed clinical activities between 133 and 270 days postpartum, but surgeons notably returned earliest, typically around 19 weeks (133 days) after delivery. In stark contrast, psychiatrists returned the latest with a median delay of approximately 39 weeks (270 days). These figures starkly contrast with general Canadian parental leave trends, where the majority take between nine and twelve months off, highlighting unique professional pressures and cultural norms within medicine.
Moreover, the study uncovers that family physicians’ return-to-work timing is influenced by practice models. Those embedded in major primary care organizations, such as family health teams, tend to resume work sooner than their colleagues operating under different frameworks. Such structural differences presumably reflect varying levels of institutional support, team-based care arrangements, and flexibility in scheduling, underscoring the role of organizational context in parental leave experiences.
While resident physicians were excluded from the study due to the absence of billing records in training phases, the authors acknowledge that alternate evidence suggests these early-career doctors also modulate workload to accommodate parenting. The exclusion emphasizes a gap in data on trainees who may face compounded pressures given their dual identity as learners and clinicians. Similarly, male physicians and adoptive parents were not included, though existing literature suggests these groups make distinct workload adjustments, reflecting the complex intersection of gender, caregiving roles, and professional expectations.
The research highlights pervasive systemic challenges facing pregnant physicians, particularly early in their careers. These challenges include not only income loss during parental leave but also maternal discrimination and the associated psychological toll. Such factors can profoundly influence physician well-being and their professional trajectories. Although this study did not directly investigate causative mechanisms, the authors advocate for policy reforms that bolster parental leave provisions and facilitate smoother transitions back to practice. Strengthening workplace supports could mitigate burnout, enhance retention, and promote health equity within the medical profession.
Methodologically, the study leveraged comprehensive billing claims data capturing actual clinical activity, offering granular insights into real-world work patterns. This approach provides robust evidence beyond self-reported measures, enabling precise quantification of workload fluctuations throughout pregnancy and postpartum periods. By analyzing extended longitudinal data, the research achieves a nuanced understanding of temporal dynamics and inter-specialty variation that prior studies have lacked.
These findings possess broad implications for healthcare administrators, policymakers, and medical institutions striving to design equitable parental leave frameworks. Acknowledging the unique occupational demands and adaptive strategies of pregnant physicians fosters more informed conversations around scheduling flexibility, call-sharing policies, and reintegration support. Ultimately, aligning workplace conditions with the realities revealed by this study is paramount for cultivating a sustainable and humane medical workforce.
Unity Health Toronto’s role in this research underscores its commitment to advancing health equity and workforce well-being. Its integrated network of hospital sites and community clinics creates an ideal landscape for such comprehensive population-based analyses. Moreover, ICES’s expertise in health data analytics continues to illuminate critical intersections between workforce dynamics and public health outcomes, guiding evidence-based decision-making.
As maternity policies evolve globally, this study offers a timely and rigorous examination of physician work patterns during a pivotal life stage. Importantly, it challenges preconceived notions and invites stakeholders to rethink support structures in healthcare professions traditionally marked by intense workloads and gendered expectations. Future research expanding inclusion to resident physicians, male caregivers, and adoptive parents will deepen understanding and foster more inclusive policy development.
In summary, this pioneering investigation illuminates the complex, often counterintuitive work patterns of physicians during pregnancy and postpartum phases. Early pregnancy workload intensification, differential return-to-work intervals by specialty, and practice model influences collectively provide a richer understanding of the realities faced by physician parents. These insights serve as a clarion call for enhancing parental leave support and fostering workplace cultures attuned to the needs of all caregivers in medicine.
Subject of Research: People
Article Title: Physician work patterns in pregnancy, parental leave, and return to the workforce
News Publication Date: April 22, 2026
Web References: http://dx.doi.org/10.1001/jamanetworkopen.2026.7543
Keywords: Physician workload, pregnancy, parental leave, return to work, medical workforce, maternal health, work patterns, health equity, physician well-being, healthcare policy, specialty variation, Ontario
Tags: billing claims data physicianshealthcare policy parental leavemedical workforce maternity leaveobstetrician work during pregnancyOntario physician pregnancy studyparental leave impact on doctorsphysician maternity leave challengesphysician work patterns pregnancyphysician workload during pregnancypostpartum return to work healthcarepregnancy trimester workload changesspecialty variations postpartum return
