囊胚腔

这个过程受滋养层细胞的介导，滋养层细胞是一群特化的细胞，起源于滋养外胚层，它包围着囊胚腔以及内细胞团[1]。

This process can be mediated through trophoblastic cell which originated in trophectoderm ; the blastocyst cavity surrounded it and the inner cell mass [ 1 ] .

哺乳动物囊胚表现出明显的不对称性，包括胚胎一侧的内细胞团和另一侧被滋养层包围的囊胚腔。

Mammalian blastocyst displays an obvious asymmetry , with the inner cell mass ( ICM ) at one end and the blastocyst cavity surrounded by the trophectoderm ( TE ) at the other .

目的观察胚胎干细胞（ES细胞）囊胚腔注射的方法构建嵌合体小鼠自发性肿瘤。

Objective To study the spontaneous tumors derived in chimeric mice resulting from injection of embryonic stem ( ES ) cells into host blastocysts .

经显微注入ICR小鼠囊胚腔中，产生4只嵌合体小鼠，经证实其中1只为种系嵌合小鼠。

When mC57ES1 cells were transfered into ICR mice blastocysts , 4 chimeric mice were obtained , one male of whom exhibited successful germ-line transmission .

“尽管囊胚腔萎缩的发生频率和程度有所不同，但是那些囊胚腔萎缩范围大而且发生频率高的胚胎更容易死亡，”Payne女士说。

" The frequency and degree of collapse varied , but the embryos that died tended to be those that had bigger and more frequent collapses ," said Ms Payne .

她对囊胚腔萎缩及重新扩张的机制进行了解释。

She explained the mechanism that underlies blastocoelic collapse and re-expansion .

这些细胞进行自我调整，以致在细胞群内部形成一个充满液体的腔，即囊胚腔。

These orient themselves so that a fluid-filled cavity , the blastocoel , forms inside the mass of cells .

实时监控录像显示在此阶段26枚胚胎中有25枚（96%）至少发生一次囊胚腔萎缩。

The time-lapse recording showed that at this stage the blastocoele collapsed at least once in25 of the26 embryos ( 96 % ) .

囊胚腔是囊胚中充满液体的腔室，大约在胚胎发育的第四或五天形成，此时胚胎外周细胞间形成紧密连接。

This is a fluid-filled cavity in the blastocyst and is formed on about day four or five when the embryo forms tight junctions between the cells around its periphery .

解冻后，33枚胚胎中有26枚（大多数胚胎含有2到10个细胞）发育到囊胚阶段，此时囊胚腔已经形成。

After thawing , 26 of the33 embryos ( most of which were composed of between two and ten cells ) developed to blastocyst stage in which the blastocoele is formed .