CK-12 Foundation
Ck 12: Life Science: Mammal Reproduction
[Free Registration/Login may be required to access all resource tools.] Mammals don't typically lay eggs, but monotremes are the exception. All other mammals give birth to live young and belong to one of two categories, the marsupials...
CK-12 Foundation
Ck 12: Biology: Monotremes
[Free Registration/Login may be required to access all resource tools.] Describes how monotremes reproduce.