How do mermaids have babys?

Answer:
None because mermaids aren't real.

Contrary to popular conceptions merfolk do not have tails. They have two legs which they hold together to swim dolphin-style. The only major difference between the merfolk and regular hominids is a large 'tail-fluke' off of each ankle -- which makes the rest of your question very easy to answer.
First answer by ID1194442006. Last edit by Wolfgang schwartzschild. Contributor trust: 533 [recommend contributor recommended]. Question popularity: 1 [recommend question].