Volume 34 - Article 27 | Pages 761–796

Birth seasonality in Sub-Saharan Africa

By Audrey Dorélien

Print this page  Facebook  Twitter

 

 
Date received:17 Apr 2013
Date published:04 May 2016
Word count:8500
Keywords:birth rate, Demographic and Health Surveys (DHS), ecological zones, seasonality, sub-Saharan Africa
DOI:10.4054/DemRes.2016.34.27
 

Abstract

Background: Despite humans’ ability to reproduce throughout the year, almost all human populations exhibit seasonal variation in reproduction. The seasonality of births has been extensively studied in North America, Europe, and East Asia but less so in African settings. This paper is the first to systematically test for and document birth seasonality in Sub-Saharan Africa.

Methods: Birth data from the Demographic and Health Surveys are aggregated by country and ecological zone. The monthly time series of births are then de-trended and converted to a percent deviation from the annual monthly mean. Finally, we calculate the periodicity of the de-trended monthly birth time series using Fourier spectral analysis and ordinary least squares regression.

Results: At the national level, births are indeed seasonal with only a few exceptions. However, we find large degrees of variation in the amplitudes (i.e., from five percent to 65 percent) and patterns (i.e., unimodal, bimodal, etc.) of seasonality across regions. Birth patterns varied with levels of maternal education, religion, and residence (i.e., urban vs. rural). Typically, mothers with lower levels of education and those residing in rural locales exhibited greater seasonal fluctuations in births. Births in West and Central African ecological zones were highly seasonal, while births in many Eastern and Southern ecological zones were not seasonal. The Eastern and Southern zones were large and included strongly heterogeneous environments and people; these heterogeneities may have masked some of the seasonal patterns.

Author's Affiliation

Audrey Dorélien - University of Minnesota Twin Cities, United States of America [Email]

Most recent similar articles in Demographic Research

» The quality of demographic data on older Africans
Volume 34 - Article 5    | Keywords: Demographic and Health Surveys (DHS), sub-Saharan Africa

» Further evidence of community education effects on fertility in sub-Saharan Africa
Volume 27 - Article 22    | Keywords: Demographic and Health Surveys (DHS), sub-Saharan Africa

» The emergence of birth limitation as a new stage in the fertility transition in sub-Saharan Africa
Volume 42 - Article 30    | Keywords: sub-Saharan Africa

» Migrant-based youth bulges and social conflict in urban sub-Saharan Africa
Volume 42 - Article 3    | Keywords: sub-Saharan Africa

» Relationship between vaccination and nutritional status in children: Analysis of recent Demographic and Health Surveys
Volume 42 - Article 1    | Keywords: Demographic and Health Surveys (DHS)

Articles

»Volume 34

 

Citations

 

 

Similar Articles

 

 

Jump to Article

Volume Page
Volume Article ID