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Am J Obstet Gynecol. 1993 Feb;168(2):480-4.

Predictors of human gestational length.

Author information

1
Department of Epidemiology, Harvard School of Public Health.

Abstract

OBJECTIVES:

Our objective was to identify statistically significant variables that determine the length of human gestation.

STUDY DESIGN:

Multiple linear regression was used to analyze 9355 observations from the Delivery Interview Program, a cross-sectional study conducted from 1977 through 1980 at the Boston Hospital for Women (now called the Brigham and Women's Hospital).

RESULTS:

Maternal parity, age, and race were found to be the most important variables determining the length of human gestation. Multiparous women, women aged < 19 or > 34 years, and black women were found to have shorter gestations than primiparous women, women aged 19 to 34 years, or white women.

CONCLUSION:

By means of our linear model the length of pregnancy for women with different risk factors can be estimated more precisely than Naegele's rule allows.

PMID:
8438913
[Indexed for MEDLINE]

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