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Seasonal Variation by Race in the Male-to-Female Ratio at Birth in the United States
Grech, V; Borg, T.
  • Grech, V; Mater Dei Hospital. Malta and National Statistics Office. Department of Paediatrics. Valletta. MT
  • Borg, T; Mater Dei Hospital. Malta and National Statistics Office. Department of Paediatrics. Valletta. MT
West Indian med. j ; 69(2): 129-133, 2021. tab, graf
Article in English | LILACS | ID: biblio-1341878
ABSTRACT
ABSTRACT

Objective:

In humans, males' births exceed females' births. This ratio is conventionally referred to as M/F and is used to denote male births 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 the United States of America and whether such variations are influenced by race. Materials and

Methods:

Data on births by gender and race from 2003 to 2013 were obtained from Centres for Disease Control and Prevention Wonder section as four races White, Black/African American, Asian/Pacific Islander and American Indian/Alaska Native. ANOVA and ARIMA tests were carried out.

Results:

This study analysed 45 103 146 live births (M/F 0.51182) over 2003 to 2013. M/F was highest in Asian/Pacific Islander (p < < 0.0001), followed by White (p = 0.002), American Indian/Alaska Native (p = 0.04) and Black/African American. Significant seasonality was present overall, with a peak in June, for Whites more than Black/African American.

Conclusion:

Parental stress lowers M/F, and lower M/F found in Black/African and American Indian/Alaskan births may be stress related. The dampened seasonality noted in Black/African American births may also be due to this phenomenon. More males were born in spring, as in other species, with interesting inter-racial differences.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Seasons / Sex / Birth Rate / Racial Groups Limits: Female / Humans / Male / Infant, Newborn Language: English Journal: West Indian med. j Journal subject: Medicine Year: 2021 Type: Article Affiliation country: United kingdom Institution/Affiliation country: Mater Dei Hospital/MT

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Full text: Available Index: LILACS (Americas) Main subject: Seasons / Sex / Birth Rate / Racial Groups Limits: Female / Humans / Male / Infant, Newborn Language: English Journal: West Indian med. j Journal subject: Medicine Year: 2021 Type: Article Affiliation country: United kingdom Institution/Affiliation country: Mater Dei Hospital/MT