Answer:
6 days
Explanation:
once the embryo reaches the Blastocyst stage, approximately 5-6 days after fertilization, it hatches out of it's zona pellucida and begins the process of implantation in the uterus.
The answer is skin. hope this helps! :)
Because they know when they are full and satisfied. They dont have Control over what they eat. But how much they eat.
