囊

In addition, the above three media could also support the development of 1 cell embryos to hatching blastocyst stage.

实验2的结果表明，在M16培养液中单独添加2.5mmol/L的牛磺酸也可支持体外培养的昆明小鼠1-细胞胚胎发育到囊胚。

Blastocyst formation is a crucial stage in early embryo development.

囊胚形成是胚胎早期发育过程中一个重要阶段。

The results of experiment shown the hetero-reconstructed embryos could further develop into blastocyst stage in vitro.

实验结果表明，小鼠、兔异种间的核移植重构胚胎可在体外完成到囊胚阶段的早期发育。

And there were statistical differences at 0.05 level of the parthenogenetic cleavage rate and blastocyst rate between development of parthenogenetic embryos in 3, 2 and 4 h.

结论］在39℃，3h内进行孤雌胚胎的运输，能获得较高的卵裂率、囊胚率。

However, the blastocyst rate of embryos cultured in TE was significantly higher than mWM and CZB.

用等量的果糖代替培养液mWM中的葡萄糖，所形成的培养液mWM3能使82%的胚胎发育到囊胚期。3。

More oocytes from natural ovulation cycles (28%) developed into blastocyst than that from superovulation (16%).

与超排相比较更多的在自然周期的体内成熟卵母细胞(16%，28%)发育到了囊胚。

Shortly after implantation the blastocyst wall, the trophoblast, consists of two layers of cells.

植入之后不久，胚囊的壁，即滋养细胞含有两层细胞。

This time the small number of blastocyst cells, once affected by the impact of harmful substances, it is difficult to repair cell damage.

这个时候囊胚细胞数量较少，一旦受有害物的影响，细胞损伤则难以修复。

It underlies the blastodisc early in development and becomes enveloped by the blastoderm during epiboly .

发育早期它在胚盘之下，外包时期变成藉由囊胚包裹。

The results showed:(1) the cellule morphous and the disposition in chick embryo of PGCs were coincident no matter stained by PAS or HE staining, and HE staining could disclose the morphologic characteristics more clearly, exactly and completely;(2) genesis of blood island could be observed at the boundary of light and dark region of the extraembryonic blastoderm at about 26 hours;(3) both the blood vessel endothelium cells and free cells of the blood island were differentiated from PGCs. The generating of genuine yolk sac was at about 44-48 hours.

结果表明：①用经典的识别原生殖细胞的PAS染色方法与HE染色所观察到的PGC在鸡胚的分布及细胞形态基本一致，而HE染色较PAS法能更有助于清晰、完整、准确地识别PGC的细胞内部结构特征；②在孵化26小时的鸡胚胚外胚盘的明暗交界处可见血岛的发生，血岛发生的时间比真正的卵黄囊产生时间（大约44-48小时）要早很多；③血岛周围的血管内皮细胞与管腔中游离细胞都来自PGC。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。