PMID: 8580650Oct 1, 1995Paper

Sex ratio of babies is unchanged after transfer of fast- versus slow-cleaving embryos

Journal of Assisted Reproduction and Genetics
E NgG Wells

Abstract

A higher proportion of male offspring has been observed after transferring faster-developing embryos in a number of animal species. Therefore, we evaluated the correlation between the sex ratio of delivered babies and the cleavage stage of transferred embryos in a human IVF-ET program. The sex of infants born (n = 104) after transfer of exclusively slower-cleaving < or = 3 cell (n = 41) versus exclusively faster-cleaving > or = 4 cell (n = 63) embryos was compared. Furthermore, all boys and girls resulting from IVF-ET (n = 213) were compared with respect to: the average number of cells in the embryos that were transferred, the embryo with the greatest number of cells in the cohort transferred and the percentage of embryos that were faster cleaving. Thirty seven percent (15/41) of infants resulting from the transfer of exclusively slower-growing embryos were girls and 38% (24/36) of the infants from the faster-growing embryos were girls (NS). The analysis all 213 babies born after 145 embryo transfer procedures did not suggest any differences in embryo cleavage rates in embryo transfers leading to male versus female infants. A greater number of boys born was not observed after transfer of faster-cleaving embryos as has been desc...Continue Reading

References

Apr 1, 1992·Molecular Reproduction and Development·K P XuK J Betteridge
Nov 8, 1980·British Medical Journal·J F Pedersen
Oct 1, 1993·Human Reproduction·U Mittwoch
May 1, 1991·Theriogenology·B AveryT Greve

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Citations

Mar 30, 2006·Reproductive Biomedicine Online·Ellice LiebermanCatherine Racowsky
Aug 2, 2001·Proceedings of the National Academy of Sciences of the United States of America·M A LarsonR M Roberts
Jun 3, 2006·Reproductive Biomedicine Online·K S RichterB H Osborn
Nov 23, 2006·Fertility and Sterility·Martha LunaJason Barritt
Jun 14, 2014·Reproductive Biomedicine Online·Munevver SerdarogullariMustafa Bahceci
Dec 10, 2014·Fertility and Sterility·Fernando BronetMarcos Meseguer
Dec 1, 2001·Human Reproduction·K LundinT Hardarson
Jul 2, 2004·Biology of Reproduction·Cheryl S Rosenfeld, R Michael Roberts
Mar 8, 2012·Reproduction, Fertility, and Development·Cheryl S Rosenfeld
Feb 18, 1998·American Journal of Obstetrics and Gynecology·R FanchinR Frydman

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