Hum. Reprod. Advance Access published online on February 10, 2005
Human Reproduction, doi:10.1093/humrep/deh756
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1 Reproductive Science Center, One Forbes Road, Lexington, MA, 02421 and Department of Obstetrics and Gynecology, University of Massachusetts Medical School, Worcester, MA, 10655, USA
* To whom correspondence should be addressed. BACKGROUND: The development of the mouse zygote following fertilization in vitro in a KSOM-type medium containing either l-glutamine or glycyl-l-glutamine has been examined, and compared with the development of mouse zygotes produced by natural fertilization. METHODS: Mouse IVF, embryo culture and embryo transfer. RESULTS: Fertilization rates, development to the blastocyst stage, implantation rate, gross fetal development and fetal body weight are not different in a KSOM-type medium containing either l-glutamine or glycyl-l-glutamine. No evidence of abnormal fetal development, such as exencephaly, was observed. The replacement of l-glutamine with glycyl-l-glutamine favoured the development of relatively more inner cell mass cells than trophectoderm cells, and reduced the numbers of pyknotic and fragmented nuclei in the blastocysts that developed in vitro. CONCLUSIONS: There is no evidence that the presence of glutamine in the medium used for IVF influences significantly the subsequent development of the zygote. Replacing glutamine with glycyl-l-glutamine may be advantageous.
Received May 4, 2004
Revised October 18, 2004
Accepted December 14, 2004
Article
Mouse embryo development following IVF in media containing either l-glutamine or glycyl-l-glutamine
2 Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA, 02115, USA
3 Beth Israel Deaconess Hospital, Boston, MA 02115, USA
4 Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA, 02115, USA
J.D. Biggers, E-mail: john_biggers{at}hms.harvard.edu
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