1.   He removed the ovaries of newborn mice and managed to keep the organs alive in petri dishes for a week.

2.   Newborn brown mice were injected with spleen and bone marrow cells, rich in lymphocytes, from genetically unrelated white mice.

3.   Researchers in three studies found that contrary to what has been considered almost gospel, the immature immune systems of newborn mice can indeed produce an immune response.

4.   So Gross injected material from leukemic mice into newborn mice of a strain known to be free of the leukemia, thus isolating a virus.

5.   Snyder has used stem cells harvested from newborn mice to treat stroke, where a localized region of the brain is damaged.

6.   The newborn mouse is not very well developed, with cartilage for bones and a small number of spherical air sacs for lungs.

7.   For instance, he noted that all of the studies so far have been done on newborn mice.