When Did You First Start To Grow?

About nine months before you were born, you started to grow from just two cells. One cell, a sperm cell, came from your father. The other cell, an egg cell, came from your mother.

These two cells joined together inside your mother’s body and formed a new cell called a fertilized egg. This cell was the very beginning of a whole human being, you.

When you were only a fertilized egg, you were about the size of the head of a pin!

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

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