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Influence of Socioeconomic Levels on Birthweight of Twins and Singletons

Published online by Cambridge University Press:  21 February 2012

Gloria M. D. D. Colletto ,
Conceição A. M. Segre  and
Silvia T. R. C. Rielli
Gloria M. D. D. Colletto*
Affiliation:
Department of Parasitology, Institute of Biomedical Sciences, University of Säo Paulo, Brazil. [email protected]
Conceição A. M. Segre
Affiliation:
Institute of Teaching and Research of Hospital Israelita Albert Einstein, Brazil.
Silvia T. R. C. Rielli
Affiliation:
Department of Biotechnology, Institute of Biomedical Sciences, University of São Paulo, Brazil.
*
*Address for correspondence: Gloria M.D.D. Colletto, Av. Prof. Lineu Prestes, 1730, sala 21, 05508-900 – São Paulo, SP, Brazil.

Abstract

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This study aimed to compare birthweight distribution of twins and singletons from three different socioeconomic level hospitals and evaluate the possible contribution of assisted reproduction technologies (ART). Data for twins and singletons were collected in the 1990s from hospitals A (370 twins, 370 singletons), B (306 twins, 306 singletons), and C (562 twins, 562 singletons). Only hospitals B and C have ART procedures. Gestational age was significantly lower in hospital C for singletons and twins. Birthweight for singletons was lower at hospital A (p < .005 for hospital B and p = .000 for hospital C); however, birthweight for twins was lower for hospitals A and C compared to hospital B (p = .000 for both comparisons). There were no differences between the mean birthweight for singletons and twins either to primigravidae or multigravidae in hospital A; nevertheless, for B and C the mean birthweight of twins was significantly lower in primigravidae than in multigravidae (p = .029 and p = .006, respectively). Considering twins up to 37-weeks of gestational age, hospital C showed the highest percentage of twin births (73.3%). These data suggest that the use of ART accounts for a disproportionate number of low birthweight and/or premature infants in primigravidae of higher socioeconomic level.

Type
Articles
Information
Twin Research and Human Genetics , Volume 7 , Issue 2 , 01 April 2004 , pp. 128 - 133
Copyright
Copyright © Cambridge University Press 2004