WORCESTER, Mass., Nov. 22 /PRNewswire/ -- Advanced Cell Technology, Inc. (ACT) and its subsidiary Cyagra, Inc. today reported that its proprietary cloning technology has been used to produce healthy and normal adult animals. ACT evaluated 30 cattle cloned from proliferating skin cells.  Twenty-four (80%) of the clones were vigorous and remained alive and healthy one to four years later (by comparison, survival to adulthood normally ranges from 84% to 87%).  Results of general health screens, physical examination and immune function were normal for all clones, including laboratory analysis on blood and urine, biochemistry, and behavioral responses.