The document discusses nutrition needs during pregnancy and lactation. It explains that pregnancy lasts about 40 weeks and is divided into trimesters. During pregnancy, a woman needs more calories, protein, minerals, vitamins and other nutrients to support the growth of the fetus and development of maternal tissues. Nutritional demands continue during lactation to support milk production. The diet during lactation should provide additional calories, fluids, rest and relaxation to sustain breastfeeding.