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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Implantation (human embryo) ： ウィキペディア英語版 Implantation (human embryo) In humans (as in all other mammals, except for monotremes), implantation is the very early stage of pregnancy at which the conceptus adheres to the wall of the uterus.〔http://www.stfm.org/fmhub/fm2004/November/Walter690.pdf〕 At this stage of prenatal development, the conceptus is a blastocyst. It is by this adhesion that the foetus receives oxygen and nutrients from the mother to be able to grow. In humans, implantation of a fertilized ovum is most likely to occur about 9 days after ovulation, ranging between 6 and 12 days. ==Implantation window== The reception-ready phase of the endometrium of the uterus is usually termed the "implantation window" and lasts about 4 days. The implantation window follows around 6 days after the peak in luteinizing hormone levels. With some disparity between sources, it has been stated to occur from 7 days after ovulation until 9 days after ovulation, or days 6-10 postovulation.〔Aboubakr M. Elnashar, Gamal I. Aboul-Enein. ''(Endometrial receptivity )''. Middle East Fertility Society Journal, Vol. 9, No. 1, 2004, pp. 10-24〕 On average, it occurs during the 20th to the 23rd day after the last menstrual period.〔(6.2 Implantation stages ) from embryology.ch at by the universities of Fribourg, Lausanne and Bern (Switzerland). Retrieved May, 2012〕 The implantation window is characterized by changes to the endometrium cells, which aid in the absorption of the uterine fluid. These changes are collectively known as the plasma membrane transformation and bring the blastocyst nearer to the endometrium and immobilize it. During this stage the blastocyst can still be eliminated by being flushed out of the uterus. Scientists have hypothesized that the hormones cause a swelling that fills the flattened out uterine cavity just prior to this stage, which may also help press the blastocyst against the endometrium. The implantation window may also be initiated by other preparations in the endometrium of the uterus, both structurally and in the composition of its secretions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Implantation (human embryo)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.