翻訳と辞書 Words near each other ・ Chorillo Formation ・ Chorin ・ Chorin railway station ・ Chorinea ・ Chorinea licursis ・ Chorinea octauius ・ Chorinea sylphina ・ Chorio- ・ Chorioactidaceae ・ Chorioactis ・ Chorioallantoic membrane ・ Chorioamnionitis ・ Chorioblastoma ・ Choriocarcinoma ・ Chorioepithelioma ・ Choriogenesis ・ Choriolaus ・ Choriolaus aegrotus ・ Choriolaus auratus ・ Choriolaus celestae ・ Choriolaus derhami ・ Choriolaus filicornis ・ Choriolaus flavirostris ・ Choriolaus fulveolus ・ Choriolaus gracilis ・ Choriolaus hirsutus ・ Choriolaus howdeni ・ Choriolaus latescens ・ Choriolaus nigripennis ・ Choriolaus ruficollis Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Choriogenesis ： ウィキペディア英語版 Choriogenesis In developmental biology, choriogenesis is the formation of the chorion, an outer membrane of the placenta that eventually forms chorionic villi that allow the transfer of blood and nutrients from mother to fetus. ==Influence on monozygotic twins== Identical twins have identical genomes in the immediate aftermath of twinning. Two-thirds of monozygotic twins share the same placenta, arising by cleavage before the fourth day of development; the other third have separate placentas because cleavage has taken place after the fourth day after choriogenesis has begun. Placentas vary with respect to the transport of nutrients and hormones, a variance that may influence epigenesis. For example, the pattern of X chromosome inactivation is affected by placental status. There is some evidence that it affects the variance in IQ test findings among identical twins, that is, monochorionic identical twins display less IQ variance one from another than do dichorionic identical twins. There is weak evidence that monozygotic twins sharing a placenta have a higher concordance rate for schizophrenia than monozygotic twins with separate placentas. Sharing a placenta increases the risk for infection, and infection in pregnancy has been shown to be a risk factor for schizophrenia. Equally striking is evidence for increasing difference in genomic expression between identical twins as they are once again implicating environmental intercession. 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「Choriogenesis」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.