Factors associated with recent increase of multiple births in Spain

Autores
Fuster Siebert, Vicente; Zuluaga, Pilar; Colantonio, Sonia Edith; De Blas, Clemente
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The increased incidence of multiple deliveries in Spain, in addition to changes in age at maternity and parity, is attributed to assisted reproductive treatments, but the relative contribution of the latter to this rise remains uncertain, due to the scarce information provided by clinics practicing those treatments. Population based data (1984-2004), including information on mother's age, nationality, marital status, date of delivery, and the characteristics of each (parity, single or multiple), and sex of newborns were provided by the Spanish Institute of Statistics. Twinning and triplet deliveries relate to maternal age, parity, and nationality. For younger ages (≤ 19, 20-24, 25-29) rates remained constant over time, but for older women (30-34, 35-39, ≥ 40) rates increased after 1994. From 1984 to 2004 the percentage of twins of opposite sex increased from 24.31 to 36.58 per cent. Since 1997, Spanish and non-Spanish mothers differentiate with respect to multiple maternity at ages over 30. In addition to unmarried Spanish women, immigrants constitute a reliable reference group that determines the convenience of segregating information on multiple deliveries respecting origin. The proportion of twins and triplets of opposite sex, maternal age, and parity patterns observed are concordant with a differential access to reproductive treatments depending on the woman's age. The present norm regulating the maximum number of fertilizations per cycle and the demand for these treatments explain the high incidence of multiple deliveries in Spain. A modified logistic curve predicts a stabilization of multiple deliveries, which will probably continue to be high in Spain.
Fil: Fuster Siebert, Vicente. Universidad Complutense de Madrid; España
Fil: Zuluaga, Pilar. Universidad Complutense de Madrid; España
Fil: Colantonio, Sonia Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad. Universidad Nacional de Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad; Argentina
Fil: De Blas, Clemente. National Institute of Statistics; España
Materia
MILTIPLR DELIVERIES
ASSISTED REPRODUCTIVE TREATMENTS
TWINNING AND TRIPLET DELIVERIES
SPAIN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/129806

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spelling Factors associated with recent increase of multiple births in SpainFuster Siebert, VicenteZuluaga, PilarColantonio, Sonia EdithDe Blas, ClementeMILTIPLR DELIVERIESASSISTED REPRODUCTIVE TREATMENTSTWINNING AND TRIPLET DELIVERIESSPAINhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The increased incidence of multiple deliveries in Spain, in addition to changes in age at maternity and parity, is attributed to assisted reproductive treatments, but the relative contribution of the latter to this rise remains uncertain, due to the scarce information provided by clinics practicing those treatments. Population based data (1984-2004), including information on mother's age, nationality, marital status, date of delivery, and the characteristics of each (parity, single or multiple), and sex of newborns were provided by the Spanish Institute of Statistics. Twinning and triplet deliveries relate to maternal age, parity, and nationality. For younger ages (≤ 19, 20-24, 25-29) rates remained constant over time, but for older women (30-34, 35-39, ≥ 40) rates increased after 1994. From 1984 to 2004 the percentage of twins of opposite sex increased from 24.31 to 36.58 per cent. Since 1997, Spanish and non-Spanish mothers differentiate with respect to multiple maternity at ages over 30. In addition to unmarried Spanish women, immigrants constitute a reliable reference group that determines the convenience of segregating information on multiple deliveries respecting origin. The proportion of twins and triplets of opposite sex, maternal age, and parity patterns observed are concordant with a differential access to reproductive treatments depending on the woman's age. The present norm regulating the maximum number of fertilizations per cycle and the demand for these treatments explain the high incidence of multiple deliveries in Spain. A modified logistic curve predicts a stabilization of multiple deliveries, which will probably continue to be high in Spain.Fil: Fuster Siebert, Vicente. Universidad Complutense de Madrid; EspañaFil: Zuluaga, Pilar. Universidad Complutense de Madrid; EspañaFil: Colantonio, Sonia Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad. Universidad Nacional de Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad; ArgentinaFil: De Blas, Clemente. National Institute of Statistics; EspañaAustralian Acad Press2008-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/129806Fuster Siebert, Vicente; Zuluaga, Pilar; Colantonio, Sonia Edith; De Blas, Clemente; Factors associated with recent increase of multiple births in Spain; Australian Acad Press; Twin Research And Human Genetics; 11; 1; 11-2008; 70-761832-42741839-2628CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1375/twin.11.1.70info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/twin-research-and-human-genetics/article/factors-associated-with-recent-increase-of-multiple-births-in-spain/DA8E7D4D9ABD4FA7707873D0AAA6FDE1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:14:58Zoai:ri.conicet.gov.ar:11336/129806instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:14:58.342CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Factors associated with recent increase of multiple births in Spain
title Factors associated with recent increase of multiple births in Spain
spellingShingle Factors associated with recent increase of multiple births in Spain
Fuster Siebert, Vicente
MILTIPLR DELIVERIES
ASSISTED REPRODUCTIVE TREATMENTS
TWINNING AND TRIPLET DELIVERIES
SPAIN
title_short Factors associated with recent increase of multiple births in Spain
title_full Factors associated with recent increase of multiple births in Spain
title_fullStr Factors associated with recent increase of multiple births in Spain
title_full_unstemmed Factors associated with recent increase of multiple births in Spain
title_sort Factors associated with recent increase of multiple births in Spain
dc.creator.none.fl_str_mv Fuster Siebert, Vicente
Zuluaga, Pilar
Colantonio, Sonia Edith
De Blas, Clemente
author Fuster Siebert, Vicente
author_facet Fuster Siebert, Vicente
Zuluaga, Pilar
Colantonio, Sonia Edith
De Blas, Clemente
author_role author
author2 Zuluaga, Pilar
Colantonio, Sonia Edith
De Blas, Clemente
author2_role author
author
author
dc.subject.none.fl_str_mv MILTIPLR DELIVERIES
ASSISTED REPRODUCTIVE TREATMENTS
TWINNING AND TRIPLET DELIVERIES
SPAIN
topic MILTIPLR DELIVERIES
ASSISTED REPRODUCTIVE TREATMENTS
TWINNING AND TRIPLET DELIVERIES
SPAIN
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The increased incidence of multiple deliveries in Spain, in addition to changes in age at maternity and parity, is attributed to assisted reproductive treatments, but the relative contribution of the latter to this rise remains uncertain, due to the scarce information provided by clinics practicing those treatments. Population based data (1984-2004), including information on mother's age, nationality, marital status, date of delivery, and the characteristics of each (parity, single or multiple), and sex of newborns were provided by the Spanish Institute of Statistics. Twinning and triplet deliveries relate to maternal age, parity, and nationality. For younger ages (≤ 19, 20-24, 25-29) rates remained constant over time, but for older women (30-34, 35-39, ≥ 40) rates increased after 1994. From 1984 to 2004 the percentage of twins of opposite sex increased from 24.31 to 36.58 per cent. Since 1997, Spanish and non-Spanish mothers differentiate with respect to multiple maternity at ages over 30. In addition to unmarried Spanish women, immigrants constitute a reliable reference group that determines the convenience of segregating information on multiple deliveries respecting origin. The proportion of twins and triplets of opposite sex, maternal age, and parity patterns observed are concordant with a differential access to reproductive treatments depending on the woman's age. The present norm regulating the maximum number of fertilizations per cycle and the demand for these treatments explain the high incidence of multiple deliveries in Spain. A modified logistic curve predicts a stabilization of multiple deliveries, which will probably continue to be high in Spain.
Fil: Fuster Siebert, Vicente. Universidad Complutense de Madrid; España
Fil: Zuluaga, Pilar. Universidad Complutense de Madrid; España
Fil: Colantonio, Sonia Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad. Universidad Nacional de Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad; Argentina
Fil: De Blas, Clemente. National Institute of Statistics; España
description The increased incidence of multiple deliveries in Spain, in addition to changes in age at maternity and parity, is attributed to assisted reproductive treatments, but the relative contribution of the latter to this rise remains uncertain, due to the scarce information provided by clinics practicing those treatments. Population based data (1984-2004), including information on mother's age, nationality, marital status, date of delivery, and the characteristics of each (parity, single or multiple), and sex of newborns were provided by the Spanish Institute of Statistics. Twinning and triplet deliveries relate to maternal age, parity, and nationality. For younger ages (≤ 19, 20-24, 25-29) rates remained constant over time, but for older women (30-34, 35-39, ≥ 40) rates increased after 1994. From 1984 to 2004 the percentage of twins of opposite sex increased from 24.31 to 36.58 per cent. Since 1997, Spanish and non-Spanish mothers differentiate with respect to multiple maternity at ages over 30. In addition to unmarried Spanish women, immigrants constitute a reliable reference group that determines the convenience of segregating information on multiple deliveries respecting origin. The proportion of twins and triplets of opposite sex, maternal age, and parity patterns observed are concordant with a differential access to reproductive treatments depending on the woman's age. The present norm regulating the maximum number of fertilizations per cycle and the demand for these treatments explain the high incidence of multiple deliveries in Spain. A modified logistic curve predicts a stabilization of multiple deliveries, which will probably continue to be high in Spain.
publishDate 2008
dc.date.none.fl_str_mv 2008-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/129806
Fuster Siebert, Vicente; Zuluaga, Pilar; Colantonio, Sonia Edith; De Blas, Clemente; Factors associated with recent increase of multiple births in Spain; Australian Acad Press; Twin Research And Human Genetics; 11; 1; 11-2008; 70-76
1832-4274
1839-2628
CONICET Digital
CONICET
url http://hdl.handle.net/11336/129806
identifier_str_mv Fuster Siebert, Vicente; Zuluaga, Pilar; Colantonio, Sonia Edith; De Blas, Clemente; Factors associated with recent increase of multiple births in Spain; Australian Acad Press; Twin Research And Human Genetics; 11; 1; 11-2008; 70-76
1832-4274
1839-2628
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1375/twin.11.1.70
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/twin-research-and-human-genetics/article/factors-associated-with-recent-increase-of-multiple-births-in-spain/DA8E7D4D9ABD4FA7707873D0AAA6FDE1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Australian Acad Press
publisher.none.fl_str_mv Australian Acad Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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