Earth Life
Earth Life: The Wonder of Milk
An interesting article on the production and value of mammalian milk. This is good insight into some of the critical factors affecting mammalian development.
Other
Marine Biology: Coral Reef Fish Ecology
Provides information about larval recruitment and other aspect of fish reproduction.
Other
Look d.com: Fish Reproduction
This site, which is provided for by LookD.com, gives information about bony fish reproduction. The information that is presented is medium in length, and worth checking out on the subject.
Regents of the University of Michigan
Animal Diversity Web: Mammary Glands
A very solid history on the evolution of, and function of, the glands that give the group mammals their name. Good comparisons of other mammals and their function.
ClassFlow
Class Flow: Human Reproduction
[Free Registration/Login Required] This flipchart discusses human reproduction, including the male and female reproductive system.
CK-12 Foundation
Ck 12: Biology: Fertilization
[Free Registration/Login may be required to access all resource tools.] Discusses the events that occur between fertilization and the embryonic stage.
Other
Quantum Conservation: Amphibian Index
A good overview and index of all the classes and species of amphibians, including sub-classes, orders, and characteristics.
Other
Glossary of Reptile Reproduction Terms
This site contains a listing of terms and definitions related to reptile reproduction.