A mother is attentive to the tempo of her foetus's movements and reactions, and tries to interpret them and to make contact with the foetus by touching her belly or singing to it. The foetus in the womb is affected by its physiological conditions in the uterus and by the mother's emotional states, but it has no way of understanding them. From the moment of birth onwards, the baby is very vulnerable and sensitive to any change from the familiar that she may experience, both around and within herself. The concept of narcissism is borrowed from Greek mythology, in which the young Narcissus falls in love with his image as reflected in a pool. Most theories deal with narcissism as bound to the self and to representations of the self or the object, while the differences among the concepts of object relations, self, and narcissism seem to have become blurred.