Beyond ARRIVE: What the Butler 2024 Study Means for Doulas and Their Clients
- Lorie Michaels, CD(DONA), PMH-C, CLC, EBB Inst.
- Jun 18
- 5 min read
If you've been following our blog, you've already seen our deep dive into the ARRIVE trial and what it means for elective induction at 39 weeks. (If you haven't read that yet, start there, then come back. It'll give you important context for what follows.)
Now there's a new piece of research worth your attention. A 2024 retrospective cohort study out of Victoria, Australia, led by Butler and colleagues and published in the journal Birth, adds important real-world data to a conversation the ARRIVE trial started but didn't finish. We've made both the Butler study and the EBB Signature Article on the ARRIVE trial available for download below so you can dig into the primary sources yourself.
A Quick ARRIVE Recap
The ARRIVE trial, published in 2018, compared elective induction at 39 weeks to expectant management in low-risk, first-time birthing people across 41 U.S. hospitals. Its headline finding drove a significant increase in induction rates: cesarean rates were modestly lower in the induction group, 18.6% versus 22.2%, an absolute difference of 3.6%.
What often gets lost in how that finding gets communicated: the trial did not find any difference in its primary outcome, which was death or serious complications for babies. The cesarean reduction was a secondary finding, achieved under tightly controlled research conditions that look quite different from most real-world birth settings. Only 6% of participants received midwifery care. Protocols required at least 12–18 hours of oxytocin after membrane rupture before diagnosing a failed induction, a threshold many providers don't follow in practice. The average participant age was 23–24, and 73% of eligible people declined to participate at all.
The bottom line on ARRIVE: the cesarean reduction it found appears to be achievable, but only under specific conditions that don't reflect the majority of U.S. birth settings. Post-ARRIVE studies looking at what has actually happened since 2018 have found mixed results, with three studies using hospital data finding no decrease in cesarean rates, two studies using birth certificate data finding small decreases, and no clear improvement in newborn health outcomes at the population level.
Now: What the Butler Study Adds
Published in the journal Birth in 2024, Butler et al. examined over 234,000 lower-risk first-time births in Victoria, Australia between 2010 and 2018. This was a population-based retrospective cohort study, meaning it captured what actually happens in real-world contemporary practice rather than under controlled research conditions.
One of its most significant methodological strengths: the researchers had access to the actual stated indication for induction in every case. This allowed them to cleanly separate non-medically indicated inductions from those done for clinical reasons, something many previous observational studies couldn't do. It's a more honest mirror of the clinical reality doulas work within every day.
Their finding directly challenges the ARRIVE headline.
In this population, induction between 38 and 41 completed weeks of gestation was associated with 23–43% higher adjusted odds of unplanned cesarean birth compared to expectant management. The more weeks along the induction occurred, the higher those odds climbed. This held true across both public and private maternity care settings, and it persisted after adjusting for maternal age, birthweight, and socioeconomic factors.
Perinatal mortality was low in both groups, below 2 per 1,000 births in the expectant management group, and lower still in the induction group. That difference only reached statistical significance at 41 weeks, which aligns with what we already understand about the risks of prolonged pregnancy.
The researchers also used what they call a "pregnancies-at-risk" approach, comparing induction on a specific gestational day versus waiting from that same day forward. This mirrors the actual clinical decision more closely than a broad gestational window comparison, and it's one of the methodological refinements that makes this study worth taking seriously.
Their conclusion is measured but direct: for lower-risk first-time birthing people, induction from 38 weeks onward appears to carry inherent risks, and providers should ensure clients are fully informed of both the potential benefits and risks before proceeding with non-medically indicated IOL.
Are These Two Studies Contradicting Each Other?
Not exactly. They're answering slightly different questions under different conditions, and that distinction matters for how you talk about this with clients.
The ARRIVE trial asked: can we achieve low cesarean rates with elective induction at 39 weeks under tightly controlled, highly supervised conditions with strict protocols for managing labor?
The Butler study asked: what actually happens to cesarean rates when non-medically indicated induction occurs in real-world contemporary practice?
The answer to the first question appears to be yes, with significant caveats. The answer to the second, in a large contemporary population, is that cesarean odds increase meaningfully.
What this research together tells us is that outcomes of elective induction at 39 weeks are highly dependent on the care setting, the provider's protocols, and who is attending the birth. Population-level research cannot substitute for individualized, fully informed decision-making.
What This Means for Your Practice
As doulas, we don't make clinical recommendations. But we are often the person a client turns to when they're trying to make sense of conflicting information, when they feel pressured, or when they want to understand what the research actually says before they decide.
Here is where you can add real value.
Help clients understand the difference between absolute and relative risk. A 16% relative risk reduction sounds significant. A 3.6% absolute reduction tells a different story. Both are technically accurate. Only one is complete.
Encourage clients to ask their provider specific questions before agreeing to an elective induction.
What is your cesarean rate with inductions?
What is your induction rate overall?
Do you follow current guidelines for diagnosing failed induction?
What are the alternatives at this gestational age?
Reminder: Leapfrog Group has (self-reported) stats for many hospitals
Remind clients that other evidence-based choices can lower cesarean risk by comparable or greater amounts without the intervention cascade that induction typically brings. Continuous doula support reduces cesarean risk by about 25% in randomized trials. Intermittent auscultation reduces it by roughly 39% compared to continuous electronic monitoring. Midwifery-led care, movement during labor, birth setting, and late hospital admission for those in spontaneous labor all have meaningful evidence behind them.
Be alert to consent issues. Research documents that a significant number of birthing people feel pressured into inductions, and some report interventions like membrane sweeps performed without explicit consent. Clients have the right to full information, the right to ask questions, the right to choose their induction method, and the right to decline. Helping them know this before they walk into those conversations is part of your role.
And hold the complexity. Neither of these studies applies neatly to every individual client. Someone with a provider who has genuinely low induction and cesarean rates, who follows best-practice protocols, and whose cervix is already favorable is in a different situation than someone being offered induction at a busy hospital where labor management looks nothing like what happened in the ARRIVE trial.
The Summary
The ARRIVE trial showed that under controlled research conditions, elective induction at 39 weeks is possible without increasing cesarean risk and may slightly lower it. The Butler 2024 study showed that in real-world contemporary practice, non-medically indicated induction from 38 weeks onward is associated with meaningfully higher cesarean odds.
Together, they tell us that context matters enormously, that how risk is communicated shapes how decisions get made, and that birthing people deserve accurate, complete, and uncoerced information before they decide.
That's where doulas live. And that's where this research becomes directly relevant to the work you do every day.
Download the Butler et al. (2024) study and the EBB Signature Article on ARRIVE
