<human>: I'm a little confused about what the difference is between a fetus and an embryo. Can you help?
<bot>: The difference between a fetus and an embryo is that a fetus is a developing human being inside the womb, while an embryo is a fertilized egg outside of the womb. A fetus is typically considered to be at least 12 weeks old, while an embryo can range from 2-3 weeks old.