The puerperium is the period after delivery when all the physiological changes in the mother revert back to its pre-pregnant, or normal state. This usually takes about six weeks.
Pregnancy is an anabolic state in which the body tries to conserve proteins and essential foods for the developing fetus. On the other hand, the puerperium is a catabolic state: to revert back to normal, it has to shed what is unnecessary and retain what is needed.
It must be appreciated that during pregnancy, the growing fetus has called upon the mother’s reserves, especially her elemental stores, such as iron, calcium, zinc etc for its own. The mother must put these things right during the puerperium.