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At 44 hrs after maturation culture with various steroids, the percentages of oocytes with the metaphase II stage nuclei were significantly higher in those cultured with cholesterol, progesterone or 20 \u03b1 -hydroxyprogesterone (72.7 to 89.1 %) than in each control oocyte group (49.3 and 58.3 %), whereas the percentages of such oocytes cultured with pregenolone, 17 \u03b1 -hydroxyprogesterone, 17 \u03b1 -hydroxypregnenolone and estradiol-17\u03b2 were similar to those of each control oocyte group. The distribution patterns of CGs in the oocytes cultured with steroids were similar to those in each control oocyte. The developmental rates to 2-cell embryos of inseminated oocytes matured in the medium containing steroids (50.0 to 73.5 %) also did not differ from those of each control oocyte group (60.0 to 69.0 %), even in the use of either steroid examined. From these findings, it was clarified in denuded porcine oocytes that the nuclear maturation to the metaphase II stage is accelerated by the treatment of some progestins and cholesterol, whereas the cytoplasmic maturation and the development after insemination are not affected by the treatment of 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[{"subitem_title": "Effects of Steroids on Maturation of Denuded Porcine Oocytes"}, {"subitem_title": "Effects of Steroids on Maturation of Denuded Porcine Oocytes", "subitem_title_language": "en"}]}, "item_type_id": "7", "owner": "1", "path": ["453/456", "485/872/1583/1607"], "permalink_uri": "http://hdl.handle.net/10191/681", "pubdate": {"attribute_name": "\u516c\u958b\u65e5", "attribute_value": "2007-04-18"}, "publish_date": "2007-04-18", "publish_status": "0", "recid": "28471", "relation": {}, "relation_version_is_last": true, "title": ["Effects of Steroids on Maturation of Denuded Porcine Oocytes"], "weko_shared_id": null}