text: i would like to know about stem cell. my child is 5 year old and is it is possible to preseve stem cell? for her. i want to know if we plan for next child then it is possible to use of stem cell (second chid) for first child. because i read that only birh time stem cell can be preserve.  also i want to know application of stem cell. whar part of our body can be regenerate by stem cell? stem cells in animals and humans are primal undifferentiated cells that retain the ability to divide and differentiate into some, or all other, cell types. (the equivalent in higher plants are meristematic cells.) stem cells have the potential to act as a repair system for the body, because they can divide and differentiate, replenishing other cells as long as the host organism is alive.  for more information about stem cell, u should visit: http://stemcells.nih.gov/