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A time to be born

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  • Anderka, M.
  • Declercq, E.R.
  • Smith, W.

Abstract

Objectives. This study used a large population-based data set (n = 619455) to establish reference standards of the timing of spontaneous vaginal births. Methods. Low-risk births in Massachusetts from 1989 to 1995 were studied. This group comprised 242276 births that met the following criteria singleton, vertex, vaginal births with a birthweight of between 2500 and 4000 g; gestation between 37 and 42 weeks; a 5-minute Apgar score greater than 6, and no induction or stimulation. Results. Low-risk births displayed a mild circadian pattern, with a peak between 11:00 AM and 1:00 PM and a trough between 11:00 PM and 1:00 AM. Subgroup analysis showed no clear differences except for parity. Conclusions. Reference standards should be developed and used as comparative norms for hospital and practice-based perinatal studies of diurnal patterns of birthing.

Suggested Citation

  • Anderka, M. & Declercq, E.R. & Smith, W., 2000. "A time to be born," American Journal of Public Health, American Public Health Association, vol. 90(1), pages 124-126.
  • Handle: RePEc:aph:ajpbhl:2000:90:1:124-126_5
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    Cited by:

    1. Okeke, Edward N. & Chari, A.V., 2018. "Health care at birth and infant mortality: Evidence from nighttime deliveries in Nigeria," Social Science & Medicine, Elsevier, vol. 196(C), pages 86-95.

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