Kassandrabastoviz
Answered

Egg of mammal attaches itself to the wall of the uterus by a placenta.

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User12456viz

Answer:

Implantation. Implantation is the very early stage of pregnancy at which the embryo adheres to the wall of the uterus and begins to form the placenta.

Tayonaforeverviz

Answer:

Implantation is the very early stage of pregnancy at which the embryo adheres to the wall of the uterus and begins to form the placenta.

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