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The Parthenogenetic Development of Porcine In Vitro Matured Oocytes Vitrified Before or After Electric Activation

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BACKGROUND: The highly efficient production of parthenogenetic embryos from vitrified porcine in vitro matured oocytes has become essential for biotechnology and biomedicine research. OBJECTIVE: To investigate the survival and parthenogenetic development of oocytes vitrified before or after electric activation. MATERIALS AND METHODS: The vitrified oocytes were parthenogenetically activated at 0, 0.5, 1, 2 and 4 h post warming (h.p.w.), and fresh oocytes were vitrified at 0, 0.5, 1, 2 and 4 h post electric activation (h.p.a.). RESULTS: In comparison with non-vitrified oocytes, the rates of survival and activation of oocytes vitrified at 0.5, 1, 2 and 4 h.p.a. were similar, but the parameters in other vitrified groups significantly decreased. Parthenogenetic development in vitrified 0.5, 1, 2 and 4 h.p.a. groups was also significantly higher than that in other vitrified groups. Moreover, the total cell numbers of blastocysts were similar among all groups. CONCLUSION: Porcine oocytes vitrified at 0.5-4 h h.p.a. showed acceptable survival and pronuclear formation, and a higher blastocyst yield could be obtained from these oocytes.
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Keywords: PARTHENOGENETIC DEVELOPMENT; PORCINE OOCYTES; SURVIVAL; VITRIFICATION

Document Type: Research Article

Publication date: September 1, 2017

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  • CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation

    The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.

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