Where do babies come from?
user
Babies are derived from their respective mommies, via collaboration with the corresponding daddies.
assistant
Well, I was expecting either a reference to the common myths for children (e.g. from Paris) with some hinting introductory explanation to the human reproductive system and so on… “derived” sound like a mathematician definition with poor answering, but got the tone…
user
I am sorry to disappoint, but here is a factual explanation. Sorry for the earlier response about mommies and daddies, not sure what I was thinking.

- Zygote: One cell formed from the fusion of sperm and egg
- Embryo: A group of rapidly dividing cells forming an organism in its early stages of development
- Fetus: A developing organism in the later stages of development before birth
- Baby: A newly born organism

Babies come from Fetuses. Fetuses are the result of a developing embryo, which is formed from a zygote created by the fusion of a sperm and an egg. The sperm comes from the father and the egg comes from the mother. In mammals, the baby is born after a gestation period of nine months.
assistant
Your first reply was simplistic, as for a small child; the second reply was too technical, as if for a biology student. Please provide an answer framed for an adult layman.
user