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Individual demands of human embryos on IVF culture medium: influence on blastocyst development and pregnancy outcome.

Abstract：

:The elucidation of the metabolic requirements of human embryos in vivo or in vitro remains, despite being intensively investigated, a work in progress. The adoption of extended embryo culture to the blastocyst stage during the last decade has entailed new challenges. With the increased attention to culture media formulations, more evidence on the sensitivity of embryos to their early environmental conditions is accumulating which might affect phenotype and developmental potential. A retrospective study was conducted that comprised 286 IVF cycles to evaluate the effect of two different culture media on blastocyst development and pregnancy outcome. Embryos were either cultured in a one step or a sequential medium. Higher fertilization rates and augmented blastocyst rates as well as higher implantation rates were observed when embryos were cultured in one step medium (P<0.05). Interestingly, the transfer of two embryos where one embryo was cultured in either medium resulted in a significantly higher rate of twin pregnancies. Although multiple pregnancies should be avoided in assisted reproduction treatment to reduce risks for offspring and mother, this higher frequency of twin pregnancies resulting from the transfer of embryos derived from different culture media suggests that each embryo makes individual demands on its early environment.

journal_name

Reprod Biomed Online

journal_title

Reproductive biomedicine online

authors

Wirleitner B,Vanderzwalmen P,Stecher A,Zech MH,Zintz M,Zech NH

doi

10.1016/j.rbmo.2010.08.003

subject

Has Abstract

pub_date

2010-12-01 00:00:00

pages

776-82

issue

6

eissn

1472-6483

issn

1472-6491

pii

S1472-6483(10)00550-X

journal_volume

21

pub_type

杂志文章

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