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Am J Obstet Gynecol. 2005 Jun;192(6):1970-3.

Birth rate and its correlation with the lunar cycle and specific atmospheric conditions.

Author information

  • 1Department of Obsetetrics, Gynecology and Women's Health, Maricopa Integrated Health System/MedPro, Phoenix, AZ, USA.

Abstract

OBJECTIVE:

This study was undertaken to use the Arizona State birth certificate database for Phoenix metropolitan hospitals, in conjunction with National Weather Service records to determine whether there is a relationship between birth rate and meteorologic or lunar conditions. This study attempts to dispel or lend significance to beliefs among hospital staff that the phase of the moon and/or meteorologic conditions are related to birth rate.

STUDY DESIGN:

Birth records were limited to spontaneous vaginal deliveries, 37 to 40 weeks' gestation, in Phoenix, between 1995 and 2000 (n = 167,956). Daily birth counts were merged with daily surface weather statistics from the National Weather Service for Sky Harbor Airport, and records of lunar phase for the same period.

RESULTS:

The analyses revealed no significant correlates of birth rate.

CONCLUSION:

Although there exists a popular belief that the phase of the lunar cycle and weather conditions affect birth rate, no such evidence was found in this study.

Comment in

PMID:
15970864
[PubMed - indexed for MEDLINE]
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