Yildiz, Ayers & Phillips (2017): PTSD Prevalence Meta-Analysis (Journal of Affective Disorders)
Up to 1 in 5 high-risk mothers develop clinical PTSD from birth
Meta-analysis of 59 studies covering 24,267 women. Community samples: 3.3% prenatal PTSD, 4.0% postpartum. High-risk samples: 18.95% prenatal, 18.5% postpartum. The most comprehensive prevalence estimate for birth-related PTSD.
Yildiz, Ayers and Phillips published a 2017 meta-analysis in the Journal of Affective Disorders that pulled together 59 separate studies of birth-related PTSD, covering 24,267 women in total. The team distinguished community samples (women from the general population) from high-risk samples (women with prior trauma, complications, or specific risk factors).
In community samples, clinical PTSD prevalence was 3.3 percent during pregnancy and 4.0 percent in the postpartum period. In high-risk samples, the numbers rose sharply to 18.95 percent prenatally and 18.5 percent postpartum.
The pattern matches what the more recent INTERSECT study found across 31 countries. The clinical PTSD rate is one number. The broader "I experienced my birth as traumatic" subjective rate is consistently higher across surveys, often in the 20 to 45 percent range, which captures women who do not meet full diagnostic criteria but still carry the experience forward.
59
Studies in the meta-analysis
24,267
Women across studies
3-4%
Clinical PTSD, community samples
~19%
High-risk samples
Why it matters
Up to one in five high-risk mothers develops diagnosable PTSD from her birth. The number is higher than postpartum depression in some populations, and routine postnatal care still does not screen for it.
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.