Michael J. Goodman, PhD, is a Senior Research Investigator at the Health-Partners Research Foundation, Minneapolis, MN. His main research focus is pediatric vaccine safety and efficacy.
Births by Day of Week: A Historical Perspective
Version of Record online: 24 DEC 2010
2005 American College of Nurse Midwives
Journal of Midwifery & Womens Health
Volume 50, Issue 1, pages 39–43, January-February 2005
How to Cite
Goodman, M. J., Nelson, W. W. and Maciosek, M. V. (2005), Births by Day of Week: A Historical Perspective. Journal of Midwifery & Womens Health, 50: 39–43. doi: 10.1016/j.jmwh.2004.09.005
- Issue online: 24 DEC 2010
- Version of Record online: 24 DEC 2010
- numerical data;
- time factors
Our objective was to describe the historical pattern of the decline in weekend births. Data on 906,100 health maintenance organization enrollees' birthdates were analyzed to show patterns of birth by day of week from 1910 to 1999. The decline in Sunday births dates to the 1930s, and the decline in Saturday births dates to the 1950s, far earlier than previously demonstrated in the literature. The expected natural birth process has been significantly modified. By examining a much longer time series than in other literature, it is also possible to see that the trend is not abating and may be increasing.