Labor induction varied
Although low-risk midwifery clients were significantly less likely to experience labor induction with oxytocin, high-risk midwifery clients were more than twice as likely to undergo induction with oxytocin than obstetrician clients (adjusted absolute difference, 11.3%).
For most risk levels, midwifery clients were less likely to have an assisted vaginal birth than physician clients, and they were significantly more likely to have a spontaneous vaginal birth. Low-risk clients who had a midwife as the MRP were nearly twice as likely to have a spontaneous vaginal birth than obstetricians’ clients, and moderate-risk clients were nearly four times as likely to have a spontaneous vaginal birth.
The rates of vaginal birth after cesarean delivery (VBAC) were significantly higher when a midwife was the MRP. In comparing midwifery clients with family physician clients, the relative and absolute differences were small, but they were larger when comparing midwifery clients with obstetrician clients. Among low-risk clients, the VBAC rate was 85.3% among midwifery clients, compared with 78.6% among family physician clients and 51.5% among obstetrician clients.
In general, the prevalence rates of adverse maternal outcomes (including blood transfusion, intensive care admissions, uterine rupture, and postpartum wound infection) were low for midwifery clients across all risk levels.
Breast- or chest-feeding at birth was significantly more common among midwifery clients across all risk levels as well.
Today, nearly 1 in 4 childbearing people in British Columbia receive care from a midwife at some point during pregnancy, birth, or the postpartum period, the study authors write. During the past 20 years, the profile of clients has evolved to include more moderate- and high-risk patients.
“Clients with more complex medical needs take more time and need more support,” said Dr. Stoll. “This means that midwives continue to stay on call, responding to pages and urgent medical concerns for their clients with no pay for being on call, no days off even for sick days, and unsafe working hours, often working more than 24 hours at a time. If we want to expand midwifery to communities where they are needed most, we need to provide an enabling environment.”
Additional studies are needed as to how different practice and remuneration models affect clinical outcomes, health care costs, and client and provider experiences, the study authors write. At the same time, there are several barriers to obtaining funding, conducting studies, and publishing research by and about midwives in Canada, Dr. Stoll said – barriers that she and her co-authors faced.
Seeking broader access
Alixandra Bacon, a registered midwife and president of the Canadian Association of Midwives, said, “These findings demonstrate that pregnant people at any level of medical risk can benefit from midwifery care. This is a testament both to the benefits of the Canadian midwifery model of care and to the seamless integration of midwifery into collaborative teams and the health system.” Ms. Bacon wasn’t involved with this study.
“If we can realize our goal of equitable access to midwifery care for all families in Canada, we can help to decrease rates of unnecessary medical intervention, preterm labor, and stillbirth,” she added.
“Midwifery is well established across most of Canada. This is yet one more piece of evidence that shows the clinical benefits of midwifery care,” Jasmin Tecson, a registered midwife and president of the Association of Ontario Midwives, said in an interview.
Ms. Tecson, who wasn’t involved with this study, noted the increasing number of clients with more complex health and social needs in Ontario. “It is time to think about how the skills and knowledge of midwives can be used with clients of different risk profiles and how the current scope of practice of midwives can be optimized and expanded,” she said. “For example, Ontario midwives are still required to prescribe medications from a limited list, despite the potential additional clinical risks and health system costs that this creates.”
The study received financial support from the University of British Columbia Stollery Fund and the University of British Columbia Work Learn Program. Dr. Stoll has an unpaid role with the Midwives Association Contract Negotiation Advisory Council. Ms. Bacon and Ms. Tecson disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.