Duration Of Human Singleton Pregnancy: A Population‐based Study

@article{Bergsj1990DurationOH,
  title={Duration Of Human Singleton Pregnancy: A Population‐based Study},
  author={Per Bergsj{\o} and Daniel W. Denman and Howard J Hoffman and Olav Meirik},
  journal={Acta Obstetricia et Gynecologica Scandinavica},
  year={1990},
  volume={69}
}
We have analysed the duration of pregnancy for singleton births in Sweden during 1976–80 by means of data from the Swedish Birth Registry. Information, which was obtained from special forms with standard questions, include date of first day of last menstrual period (LMP) and whether that date was considered reliable or not. Recording was done prospectively, starting at the first antenatal visit. In 10% of cases the dates were labelled uncertain. Information on LMP and birth dates, parity, age… 

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