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Twin and preterm births fell after change in IVF

BMJ 2005; 331 doi: http://dx.doi.org/10.1136/bmj.331.7513.0-c (Published 11 August 2005) Cite this as: BMJ 2005;331:0-c

The rate of twin births in Sweden after in vitro fertilisation fell from 29% in 1991 to 18.5% in 2001, …

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