What is a developing baby called in the very early stages?

• Correct Answer: embryo
• sperm
• fetus
• uterus

Explanation: While a woman is pregnant, the developing baby may be called an embryo or a fetus. Do these mean the same thing? No, in the very early stages the developing baby is called an embryo, while in the later stages it is called a fetus. When the ball of cells first implants into the uterus, it is called an embryo . The embryo stage lasts until the end of the 8 th week after fertilization. After that point until birth, the developing baby is called a fetus .

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