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Acta Obstetricia et Gynecologica Scandinavica Volume 86, 2007 - Issue 7
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ORIGINAL ARTICLE

Increasing twinning rates in Norway, 1967–2004: the influence of maternal age and assisted reproductive technology (ART)

Anne Tandberg Department of Obstetrics and Gynaecology, Haukeland University Hospital, Bergen, NorwayCorrespondence[email protected]
,
Tone Bjørge Department of Public Health and Primary Health Care, Section for Epidemiology and Medical Statistics, University of Bergen, Bergen, Norway; Medical Birth Registry of Norway, Norwegian Institute of Public Health, Bergen, Norway
,
Per E. Børdahl Department of Obstetrics and Gynaecology, Haukeland University Hospital, Bergen, Norway; Institute of Clinical Medicine, Section for Gynaecology and Obstetrics, University of Bergen, Bergen, Norway
&
Rolv Skjaerven Department of Public Health and Primary Health Care, Section for Epidemiology and Medical Statistics, University of Bergen, Bergen, Norway; Medical Birth Registry of Norway, Norwegian Institute of Public Health, Bergen, Norway
Pages 833-839 | Received 13 Dec 2006, Published online: 03 Aug 2009

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Rita De Cássia Alam Machado, Maria De Lourdes Brizot, Adolfo Wenjaw Liao, Vera Lúcia Jornada Krebs & Marcelo Zugaib. (2009) Early neonatal morbidity and mortality in growth-discordant twins. Acta Obstetricia et Gynecologica Scandinavica 88:2, pages 167-171.
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. (2007) Reply: Increasing twinning rates in Norway. Acta Obstetricia et Gynecologica Scandinavica 86:11, pages 1407-1408.
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. (2007) Increasing twinning rates in Norway. Acta Obstetricia et Gynecologica Scandinavica 86:11, pages 1407-1407.
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