Volume 349, Issue 9062, Pages 1398-1399 (May 1997) Twinning rates Mike Murphy, Eate Hey The Lancet Volume 349, Issue 9062, Pages 1398-1399 (May 1997) DOI: 10.1016/S0140-6736(05)63241-2 Copyright © 1997 Elsevier Ltd Terms and Conditions
Indirectly age-adjusted twin rates in England and Wales 1970 rates in 5-year maternal age-groups used as standard; 1981 rates are unreliable and omitted. The Lancet 1997 349, 1398-1399DOI: (10.1016/S0140-6736(05)63241-2) Copyright © 1997 Elsevier Ltd Terms and Conditions