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Birth rate

Seasonal Variation by Race in the Male to Female Ratio at Birth in the United States

DOI: 
10.7727/wimj.2015.279
Synopsis: 
Births by gender and by race for 2003-13 for the US showed more male births in Asians, followed byWhites and American Indian/Alaska Native populations. Significant seasonality was present (June peak) for Whites more than Black/African American.

ABSTRACT

Objective: In humans, male exceed female live births. This ratio is conventionally referred to (M/F) male to female ratio and is used to denote male divided by total births. This ratio is influenced by a large number of factors and has been shown to exhibit seasonality. This study was carried out in order to ascertain whether seasonal variation in M/F exists in United States and whether such variations are influenced by race.

Accepted: 
30 Sep, 2015
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e-Published: 24 Mar, 2016

Disclaimer

Manuscripts that are Published Ahead of Print have been peer reviewed and accepted for publication by the Editorial Board of the West Indian Medical Journal. They may appear in their original format and may not be copy edited or formatted in the style guide of this Journal. While accepted manuscripts are not yet assigned a volume, issue or page numbers, they can be cited using the DOI and date of e-publication. See our Instructions for Authors on how to properly cite manuscripts at this stage. The contents of the manuscript may change before it is published in its final form. Manuscripts in this section will be removed once they have been issued to a volume and issue, but will still retain the DOI and date of e-publication.

The Male-female Birth Ratio in California and the 1992 April Riots in Los Angeles

Issue: 
DOI: 
10.7727/wimj.2014.338
Pages: 
223–5
Synopsis: 
Stress induces spontaneous abortions that affect male fetuses more than female fetuses. The April 1992 Los Angeles riots constituted six days of civil unrest. This study showed that male births in California State dipped following this event.

ABSTRACT

Accepted: 
23 Mar, 2015
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e-Published: 24 Mar, 2015

The Influence of Migration on Secular Trends in Sex Ratios at Birth in Cuba in the Past Fifty Years

Issue: 
DOI: 
10.7727/wimj.2013.336
Pages: 
368–72
Synopsis: 
This paper highlights a temporal relationship between Cuban migration and male to female live birth ratio (M/F), with M/F dipping in response to the possibility of leaving Cuba, often followed by sharp rises associated with a predominantly male efflux from the country.
ABSTRACT
 
Background: Secular trends have been found in the male-female ratio at birth (M/F: male births divided by total births) in various countries and this ratio is anticipated to approximate 0.515.
Methods: Annual national data for male and female live births in Cuba with contingency tables were obtained from the World Health Organization and analysed.
Revised: 
04 Apr, 2014
Accepted: 
14 Apr, 2014
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e-Published: 05 May, 2014
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