The interaction of Pre and Post-Heaven Energies
In Chinese Medicine conception is the joining of the sexual essence of mother and father forming what is called Pre-natal or Pre-heaven Essence. This Pre-natal Essence combined with the mothers Essence nourishes the foetus throughout pregnancy. After birth the young infant starts to breath, eat and drink and extracts Essence from the food it ingests. This Essence extracted from food forms what is known as Post-natal or Post-heaven Essence.