It was previously believed that the mammalian embryo developed in the impervious uterus of the mother, protected from all extrinsic factors.

He soon passed on to the vertebrates, and studied the amphibians and mammalian embryos.

By contrast, mammalian embryos survive best when they are frozen at the earliest possible stage of development.

It is only after the mammalian embryo has implanted in the uterus that differentiation and organization of the fetus occurs.

In the 1960s, Brinster developed the first reliable in vitro culture system for early mammalian embryos.

Dr Keith Brennan looks at the regulatory pathways that control the development of mammalian embryos.

Expanding this research, he included kidney and muscle cells as well as mammalian embryos.

You see here an effort to synthesize a mammalian embryo.

The layer, present in mammalian embryos, appears to be dormant in adult mammals.

However, due to the variability and regulative nature of mammalian embryos, experimental evidence for establishing these early fates remains incomplete.