Document Detail


Trends in twin and triplet births: 1980-97.
MedLine Citation:
PMID:  11968567     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This report presents data from U.S. birth certificates on the numbers and rates of twin and triplet and other higher order multiple births for 1980-97. Over the study period, the number of twin births rose 52 percent (from 68,339 to 104,137) and triplet and other higher order multiple births (heretofore referred to as "triplet/+") climbed 404 percent (from 1,337 to 6,737 births). Comparable but less pronounced rises were observed in twin and triplet/+ birth rates. Growth in twin and triplet/+ birth rates was most marked among women aged 30 years and over. Between 1980-82 and 1995-97, the twin rate rose 63 percent for women aged 40-44 years, and soared nearly 1,000 percent for women 45-49 years. (As one result, there were more twins born to women 45-49 years of age in 1997, than during the entire decade of the 1980's.) The triplet/+ birth rate rose nearly 400 percent for women in their thirties and exploded by more than 1,000 percent for women in their forties. The extraordinary rise in multiple births resulted in a shift in age-specific patterns, and the highest twin and triplet/+ birth rates now are for women 45-49 years of age. Historical differences in twinning rates between non-Hispanic white and black mothers have been largely eliminated (28.8 per 1,000 non-Hispanic white compared with 30.0 for black women). Non-Hispanic white women were more than twice as likely as non-Hispanic black or Hispanic women to have a triplet/+ birth. Rates of low birthweight, very low birthweight, and infant mortality were 4 to 33 times higher for twins and triplet/+ compared with singleton births. The risk for these adverse outcomes was lowest for twins and triplet/+ born to women 35-44 years of age. Twin birth rates for Massachusetts and Connecticut were at least 25 percent higher than the U.S. rate; triplet/+ rates for Nebraska and New Jersey were twice the national level.
Authors:
J A Martin; M M Park
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System     Volume:  47     ISSN:  1551-8922     ISO Abbreviation:  Natl Vital Stat Rep     Publication Date:  1999 Sep 
Date Detail:
Created Date:  2002-04-23     Completed Date:  2002-05-14     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9814753     Medline TA:  Natl Vital Stat Rep     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-16     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Birth Rate / trends*
Female
Humans
Maternal Age
Middle Aged
Pregnancy
Pregnancy, Multiple / statistics & numerical data
Prevalence
Triplets / statistics & numerical data*
Twins / statistics & numerical data*
United States / epidemiology
Vital Statistics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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