You May Carry Cells From Siblings, Aunts and Uncles, Leiden University Medical Center Study  
6/14/2012 7:26:46 AM

YOUR siblings may be closer to you than you thought. Male cells have been found in the umbilical cord blood of baby girls with older brothers, suggesting that the transfer of cells between mother and baby may be more extensive than previously imagined. Indeed, all of us may be walking chimeras.