English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/45924
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Decline in Human Fertility Rates with Male Age: A Consequence of a Decrease in Male Fecundity with Aging?

AuthorsMatorras, Roberto; Matorras, Francisco ; Expósito, Antonia; Martínez, Lorea; Crisol, Lorena
KeywordsHuman fertility
Fertility, male age
Sperm quality, demography
Natural fertility
Birth rate
Issue Date2011
PublisherS. Karger AG
CitationGynecologic and Obstetric Investigation 71(4): 229-235 (2011)
Abstract[Background]: The objective of this study is to investigate the influence of male age on human fertility, defined as the birth rate for a given population. [Methods]: Data from the Spanish National Statistics Institute (INE) for the year 2004 from a total of 454,753 newborn infants and sorted by male and female age groups were evaluated. In order to correct the influence of female age-related fertility, a different analysis was performed considering only women under 30 years of age. [Results]: From a demographic point of view, male fertility started to decline at 35–39 years of age. This decline is constant and follows an exponential pattern (slope –0.11 to –0.12). The trend persisted when the data were adjusted for every 1,000 men in the age group, as well as when only women under the age of 30 were considered. Male fertility showed a 21–23% annual decrease starting at the age of 39. [Conclusion]: An exponential decrease in human fertility which is independent of the woman’s age was observed with male aging. This decay is probably due to a downfall in male fecundity, closely related to a decline in sperm quality. However, social or behavioral causes for this trend cannot be excluded.
Description7 páginas.
Publisher version (URL)http://dx.doi.org/10.1159/000319236
URIhttp://hdl.handle.net/10261/45924
DOI10.1159/000319236
ISSN0378-7346
E-ISSN1423-002X
Appears in Collections:(IFCA) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.