"This brief textbook of human development covers the events of fertilization, gestation, and sex determination, followed by descriptions of the science of cloni

Research on the early human embryo has long been recognized as essential to progress in a host of biomedical areas from reproductive medicine to the treatment o

The ethics of creating -- or declining to create -- human beings has been addressed in several contexts: debates over abortion and embryo research; literature o

Saving lives versus taking lives: These are the stark terms in which the public regards human embryo research--a battleground of extremes, a war between science