Optimal nutrition during pregnancy, which includes adequateamounts of all of the required vitamins, minerals, and energy providing macronutrients, actually begins preconceptually. Because developing fetuses depend solely on the transfer of substrates from their host, there is simply no other means to acquire nutrition in utero. The cliché that the “fetus is the perfect parasite”implies fetuses take all they require at the expense of the host.However, at some point nutritional deficiency can result in premature labor, relieving the host of an ongoing nutritional debt.
Pregnancy leads to many complications like anaemia, constipation, oedema, pregnancy induced hypertension, gestational diabetes mellitus which need proper nutritional surveillance for good health of mother and the foetus