The person who delivers your baby may be a stranger
In the only national American survey to ask, 64% of women were delivered by their own prenatal clinician, 12% by someone they had met briefly and 21% by someone they had never met.
Most American women see the same clinician all through pregnancy. Then labor starts, and the one appointment nobody can schedule is the one where continuity breaks.
The national survey of 2,400 American mothers reports it like this: We also asked mothers if the person who was their primary birth attendant had been their primary prenatal provider, and in the clear majority of cases (64%), it was. For nearly one in three women, however, it was someone she had either met briefly (12%) or had never met (21%).
The remaining few percent are not itemized in the report, so they are not reconstructed here.
In that survey, 76% of women on Medicaid and 78% of privately insured women usually saw the same person for prenatal care. So the antenatal relationship mostly holds. What does not hold is who is there at the end, and it does not fail evenly: 37% of women on Medicaid or CHIP had never met the person who delivered their baby, against 28% of privately insured women. That difference was reported as statistically significant.
An important caution about that 64%. It comes from a survey of births in 2011 and 2012, and the question has not been asked nationally since. No other source can answer it, because the birth certificate records what kind of clinician attended, not whether you had ever met them. Treat 64% as the last good measurement, not as today's figure.
Who attends American births now. In the same survey, 70% of women were attended by an obstetrician, 10% by a midwife and 6% by a family physician. Nationally, 12.0% of all US births in 2024 were delivered by a certified nurse midwife.
The randomized evidence on knowing your midwife. A Cochrane review of 17 trials and 18,533 women compared care from a known midwife or small named team against usual care. Under usual care, about 96 women in every 1,000 (9.6%) were attended in labor by a midwife they already knew. Under a continuity model, about 878 in every 1,000 (87.8%) were. The relative figure is a rate ratio of 9.13 (95% confidence interval 5.87 to 14.21).
The Egger's regression-based test indicates significant publication bias in the meta-analysis on attendance at birth by a known midwife, with a significant intercept (P = 0.048) and a strong correlation between effect size and its standard error (P = 0.002), suggesting that smaller studies with less favourable outcomes are likely missing from the analysis.And the fact that matters most for an American reader: none of the 17 trials was conducted in the United States. They were done in Australia, Canada, China, Ireland and the United Kingdom.
On the clinical outcomes the review is steadier. Spontaneous vaginal birth: 663 per 1,000 with usual care against 696 per 1,000 with continuity, moderate certainty. Cesarean birth: 161 per 1,000 against 147 per 1,000, moderate certainty. Those are real differences and they are small in absolute terms. The reviewers also report, without pooling it, that women in continuity models generally reported more positive experiences during pregnancy, labour, and postpartum
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Why the American clinician is often not there. Many hospitals now use ob-gyn hospitalists, doctors who work only on the labor ward and do not have an office practice. ACOG's document on them is direct about what you are owed: Health care providers should inform their patients if ob-gyn hospitalists are a part of the health care team that may provide their care.
ACOG also describes the common alternative, in which a practice takes turns: In lieu of office hours, obstetrician-gynecologists take turns covering the labor ward and hospital floors on a rotating schedule that includes day, night, and weekend shifts.
How common is this? Honestly, nobody can say. ACOG cites an estimate that in 2014 there were more than 1,700 ob-gyn hospitalists at more than 243 US hospitals, about 10% of hospitals offering obstetric care. A 2010 survey of 68 member hospitals found nearly 40% used them. A study of 182 California community hospitals in 2012 found 23.6% did. Three different sets of hospitals, three different years, and no current national figure. The one thing that is settled is that you can ask your own hospital.
"Who covers when you are not on, and can I meet them?"
"Does this hospital use ob-gyn hospitalists, and if so, will one of them be caring for me?"