Cochrane Systematic Review (Bohren, 2017)
25% fewer C-sections. Zero harms. The gold standard of evidence.
26 RCTs. 15,800 women. 25% fewer C-sections. 10% fewer instrumental deliveries. 38% fewer low Apgar scores. 8% more spontaneous vaginal births. Labor shortened by 41 minutes. 35% fewer negative experiences. Zero harms. Strongest with trained doulas.
The Bohren Cochrane review is the strongest evidence in the doula literature, and Cochrane is the strongest type of evidence in medicine generally. The team pooled data from 26 randomized controlled trials covering 15,800 women across multiple countries.
The results showed continuous one-on-one labor support reduced cesareans by 25 percent, reduced instrumental deliveries by 10 percent, reduced low Apgar scores by 38 percent, increased spontaneous vaginal births by 8 percent, and shortened labor by 41 minutes on average. Women reported 35 percent fewer negative birth experiences when they had continuous support. The review documented zero harms across all 26 trials.
The effect was strongest when the support came from someone independent of the hospital staff and the woman's social network. That last point matters. A doula is not the same as the partner being present, and the evidence is clearer for the doula role than for additional social support generally.
26
Randomized controlled trials
15,800
Women in the meta-analysis
25%
Cesarean reduction
41 min
Average labor shortening
0
Documented harms
Why it matters
When the highest level of evidence in medicine shows a single intervention reduces surgery, shortens labor, and improves maternal experience with no documented harms, the slow uptake of that intervention is a system problem, not an evidence problem.
This is one finding from the research library behind How to Birth a Mother. Everything here traces back to a study, a dataset, or a systematic review.