结果：1）枯萎卵妊娠的胎囊内只有囊液，没有胚胎组织。 妊娠囊外没有绒毛组织或绒毛组织较稀疏。
Results:1) There is no embryonic tissue in gestation sac without or with little villous tissue in anembryonic pregnancy.
除了在本研究中利用基因调控网络中的小鼠胚胎干细胞的优势外，深入研究必须更加直接地集中于人类干细胞。
Despite the advantages of using mouse es cells in the study of gene regulatory networks, further research must focus more directly on human stem cells.
为胚胎发育早期绒毛外滋养层细胞侵袭的基因调控机制的研究提供了实验基础。
This study would help us to reveal the mechanism of gene network regulation in EVT invasion in early embryo development.
目的研究胚胎发育中神经视网膜对血视网膜外屏障结构形成的作用。
Objective To investigate effects of neural retina on development of the structure of outer blood retinal barrier in embryogenesis.
外源基因转染后的衰老细胞核移植后能支持克隆胚胎的体外早期发育。
The senescent transfected MEF cells as donors of nuclei could support the early development of cloned embryos after nuclear transfer.
目的探讨胚胎大鼠神经干细胞的体外培养条件及外源基因的表达效率。
Objective to explore the culture conditions for the neural stem cells from embryonic rat cortices and to test their efficacy of expressing exogenous gene.
结果：8周的胚胎，气管壁由2 3层复层柱状上皮细胞及外周的间充质构成，上皮细胞的PAS反应为阳性。
Result: at 8-week embryo, trachea consists of 2-3 layers of stratified columnar cells and mesenchyme around the cells, the reaction of PAS of epithelium was positive.
小鼠的造血和血管系统起源于胚外中胚层。胚胎期6.5-7天时在卵黄囊形成特征性的血岛结构发生向造血和内皮细胞的分化。
The hematopoietic and vascular systems of the mouse arise from extraembryonic mesoderm that migrate through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.
而若将金鱼胚胎置入高浓度的玻璃化溶液中快速浸入液氮，胚胎外溶液可实现玻璃态固化。
When fish embryos in high concentration vitrification solutions are directly quenched to LN_2, the extra-embryo solutions can be vitrified.
我们利用二维培养将胚胎干细胞分化为具有外胚和间充质特性的细胞，再将这些细胞复合入三维上皮组织。
We derived cell populations with properties of ectodermal and mesenchymal cells in 2D culture and incorporated these divergent cell populations into 3D epithelial tissues.
我们利用二维培养将胚胎干细胞分化为具有外胚和间充质特性的细胞，再将这些细胞复合入三维上皮组织。
We derived cell populations with properties of ectodermal and mesenchymal cells in 2D culture and incorporated these divergent cell populations into 3D epithelial tissues.
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