The basic principles of embryogenesis and germline engineering - from the Association of Reproductive Health Professionals.

Broad range of basic data including scientists, methods, stem cells, research, and abnormalities.

Six cloned calves have been created from cells cultured in vitro for up to three months, confirming previous work showing that relatively "old" cells can be used to clone whole animals.

A collection of Web resources on the scientific, ethical, and legal aspects of animal and human cloning. Includes articles, books, research, and societies.

Illustrated article with references.