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2008:
Lei Zi-Li; Huang Jun-Cheng; Shi Li-Hong; Miao Yi-Liang; Nan Chang-Long; Yang Ji-Wen; OuYang Ying-Chun; Sun Qing-Yuan; Chen Da-Yuan
Full term development of normal mice after transfer of IVF embryos derived from oocytes stored at room temperature for 1 day.
Zygote (Cambridge, England) 2008;
16(
1):.
Early studies have shown that some mouse cumulus-oocyte complexes (COCs) stored at room temperature for 24 h still retained full developmental potential. In this study, we stored denuded mouse oocytes (DOs) at room temperature (25 degrees C) for 24 h and activated these oocytes with 10 mM SrCl2 or fertilized the oocytes by IVF. We found that nearly half of the DOs stored at room temperature for 1 day can be fertilized normally by IVF and that two foster mothers gave birth to seven pups. Embryos from stored oocytes were cultured in CZB medium with or without 1 microg/ml 17beta-estradiol (E2). The numbers of embryo that developed to morula/blastocyst stage after parthenogenetic activation and IVF were significantly increased when E2 was added to the culture (p<0.05). These results suggest that E2 might improve mouse embryo development in vitro. The birth of seven agouti pups and their healthy growth indicated that the storage of DOs at room temperature for 1 day may be a practical procedure for mammalian reproduction.
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