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Human Reproduction 2006 21(3):838-839; doi:10.1093/humrep/dei361
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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

Reply to: ‘Multiple-birth risk associated with IVF and extended embryo culture: USA, 2001’

D.M. Kissin1,2, L.A. Schieve1, M.A. Reynolds1 and M. Macaluso1

1 Women’s Health and Fertility Branch, Division of Reproductive Health, NCCDPHP, Centers for Disease Control and Prevention, Atlanta, USA

2 To whom correspondence should be addressed at: Women’s Health and Fertility Branch, Division of Reproductive Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, MS K-34, Atlanta, GA 30341-3724, USA. E-mail: Dtk3@cdc.gov

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

Sir,

We appreciate the interest of Surrey et al. in our analyses of multiple-birth risk associated with extended embryo culture.

Dr Surrey and colleagues are concerned that we chose multiple-birth risk and multiple pregnancy risk as outcome measures instead of presenting our results by multiple order (twins, triplets, etc.). We chose not to separate multiple pregnancies and births by the number of fetuses and infants because our focus is on the overall multiple birth problem, as it is one of . . . [Full Text of this Article]


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