blastocyst

• Nom désignant un stade précoce du développement embryonnaire chez les mammifères placentaires, caractérisé par une différenciation cellulaire en une masse cellulaire interne et une couche externe de trophoblaste.

A noun referring to the blastula of a placental mammal, characterized by the early differentiation of cells into an inner cell mass and an outer trophoblast layer.

1. Early embryonic structureC1formalmedical

   A structure formed in the early development of mammals, consisting of a hollow ball of cells with an inner cell mass that will develop into the embryo.

   Blastocyste

   • The blastocyst implants into the uterine wall about a week after fertilization.
   • In IVF, the embryo is typically transferred at the blastocyst stage.
   • The inner cell mass of the blastocyst gives rise to the fetus.