Question

what are the changes that take place from

zygote to foctus,​

Answer 1

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• First, the zygote becomes a solid ball of cells.
• Then it becomes a hollow ball of cells called a blastocyst.
• Inside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.