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Human Reproduction 2006 21(3):837-838; doi:10.1093/humrep/dei360
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© The Author 2005. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Letter to the editor

Multiple birth risks associated with IVF and extended embryo culture: USA, 2001

Eric Surrey1,5, Owen Davis2, William B. Gibbons3 and David Grainger4

1 President, 2 Immediate Past President, 3 President-Elect, 4 Vice-President and Research Committee Chairman, Society for Assisted Reproductive Technology

5 To whom correspondence should be addressed. Eric S.Surrey, M.D., 799 E. Hampden Ave, #300, Englewood, C0 80113, USA. E-mail: Esurrey@colocrm.com

The first 10% of the full text of this article appears below.

Sir,

We reviewed the manuscript by Kissin et al. (2005)Go with great interest. The authors suggest variations in live birth and multiple pregnancy rates across various patient groups who underwent embryo transfer with cleavage stage embryos on day 3 or blastocyst stage embryos on day 5 without significant differences. The authors analysed the data according to the day of embryo transfer and whether or not supernumerary embryos were frozen. There are several issues which make interpretation of the conclusions somewhat challenging. The . . . [Full Text of this Article]


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