...iginal magnification: ×400); D: 32-cell embryo (Original magnification: ×400) J X L A B ②囊胚期： 囊胚腔（Blastocoele）：桑椹胚形成后，卵裂球分泌的 液体在细胞间隙积聚，最后在胚胎中央形成一个充满液体的腔。
After thawing, 26 of the 33 embryos (most of which were composed of between two and ten cells) developed to blastocyst stage in which the blastocoele is formed.