胚はい盤ばん胞ほう

noun

blastocyst; blastodermic vesicle

A biological term for the early mammalian embryo stage, used in developmental biology and reproductive medicine.

• 胚はい盤ばん胞ほうは受じゅ精せい後ご約やく5日かで形けい成せいされる。

  The blastocyst forms about five days after fertilization.