This physiological mechanism is only just beginning to be understood
In a previous article, we referred to the maternal foetal dialogue in the genomic area (See HERE). It is now known (BioEssays 37; 1106-1118,2015) that foetal cells, which can cross to the mother via the placenta, can affect her health and some of her physiological functions by acting like stem cells, giving rise to both adverse and beneficial effects. However, the effect may go even further, as the foetal cells can ensconce themselves in the mother and could somehow affect the foetus in a subsequent pregnancy. This physiological mechanism is only just beginning to be understood. Its real role in the maternal-foetal dialogue has yet to be determined.