How do mammals lay eggs?

Answer:
There are just two types of egg-laying mammals. They are the platypus and the echidna.

These animals, known as monotremes, lay eggs for the purpose of reproduction. They lay eggs via sexual intercourse as all mammals do.
First answer by Tuscarora007. Last edit by On the Wallaby. Contributor trust: 2763 [recommend contributor recommended]. Question popularity: 1 [recommend question].