It has just been discovered that women carry fetal cells from all the babies they have carried. Crossing the defensive boundaries of our immune system and mixing with our own cells, the fetal cells circulate in the mother’s bloodstream for decades after each birth. The body does not tolerate foreign cells, which trigger illness and rejection. But a mother’s body incorporates into her own the cells of her children as if they recognize each other, belong to each other. This fantastic melding of two selves, mother and child, is called human microchimerism. My three children are carried in my bloodstream still….
How did we not know this? How can this be a surprise?