Related Experiment Video
Updated: Feb 4, 2026

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting
Published on: January 12, 2018
The relationship between maternal age, body mass index, and the rate of preterm birth
Joachim W. Dudenhausen1,2, Mirjam Kunze3, Ursula Wittwer-Backofen4
1Department of Obstetrics, Charité University School of Medicine, Berlin, Germany
Objective:
The aim of the present study was to assess the influence of maternal age and maternal body mass index of early pregnancy on the risk of preterm delivery.
Material And Methods:
The study included 2.1 million liveborn single newborns with documented data at perinatal surveys. Statistical analyses were performed using the SPSS statistics program.
Results:
The risk of preterm births increased in obese women and in women with advanced age.
Conclusion:
Strategies should be developed to reduce preconceptional body mass index, and guidelines are required to help advise women who postponed childbearing.
Related Concept Videos
Birth Control Methods
Reduced Mass Coordinates: Isolated Two-body Problem
Relationship Formation
Concentration and Rate Law
For example, in a generic reaction aA + bB ⟶ products, where a and b are stoichiometric coefficients, the rate law can be written as:
Ending Relationships
Rate-Determining Steps
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...

