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Acta Obstetricia et Gynecologica Scandinavica Volume 86, 2007 - Issue 11

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LETTER TO THE EDITORS

Increasing twinning rates in Norway

Page 1407 | Received 16 Aug 2007, Published online: 03 Aug 2009

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Tandberg A, Bjørge T, Børdahl PE, Skjaerven R. Increasing twinning rates in Norway 1967–2004: the influence of maternal age and assisted reproductive technology (ART). Acta Obstet Gynecol Scand. 2007; 86: 833–9
PubMed Web of Science ®Google Scholar
Procope BJ, Timonen S, Widholm O. Intracutaneous hormone tests in patients with high oestrogen indices in vaginal smear. Ann Chir Gynaecol Fenn. 1961; 50: 445–57
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