So, to see this important time is to glimpse the first embryonic stages of our universe's diverse chemistry. (science.howstuffworks.com)
The breast stem cells at this late embryonic stage were sufficiently abundant to simplify their isolation. (salk.edu)
But the great and encouraging consequence of this breakthrough is that the humanity of the unborn child, even at the earliest embryonic stage of development, is now a subject of polite conversation even in the circles that so fanatically resisted acknowledging the facts of life. (firstthings.com)