The abundant literature dealing with the postpartum blues has failed t
o describe a possible causing factor in these emotional and physical m
anifestations which are frequently observed in mothers during the firs
t few days following delivery. The post partum blues has been consider
ed as a promising model for depressive states but its function has nev
er been clearly established. No agreement has been reached as to its p
hysiological mechanism. Presently there is a renewed interest for the
<< third day blues >> in relation to post-birth depression, which is k
nown to be frequent, and to the early interactions. The authors presen
t a review of the literature and emphasize the necessity to approach t
his issue from a new standpoint and with new conceptual and measuremen
t tools. The role of post partum blues could well be, through a biolog
ical process involving the dopamine, to facilitate the establishment o
f early mother-infant bonds by provoking a decrease in blunted affect.