What are the most common nutritional deficiencies during pregnancy and childbirth, especially our micronutrients and vitamins. The first deficiency is calcium, in our maternity period, in addition to your basic nutritional supply, our basic nutritional supply of calcium is how much, less than 400ug, maternity, mid and late pregnancy, lactation how much?1200-1500mg, how much milk can be supplemented, eat 400ml can be supplemented with 400, and 800, which we are short of how much, still short of 400 to 300 400- 300, so encourage calcium supplementation during pregnancy and childbirth. Another is that iron is not enough, because the iron in our food is actually very low, basically there is not much absorption, and how much iron our pregnant fetus needs, to consume the mother 3g hematocrit, this 3g hematocrit we have to rely on our daily life is not enough, we rely on the previous method of supplementation what animal liver, but animal liver is not easily accepted because of contamination, so pregnancy can be supplemented by The vitamins can be supplemented by Aleve. Vitamin deficiency can cause our fetus to grow poorly, increase the incidence of pre-eclampsia, possible miscarriage, premature birth and fetal birth defects, and a host of other problems. However, if there is excess nutrition, it can cause the occurrence of huge babies, gestational diabetes, gestational hyperlipidemia, and more seriously, after the birth of a huge baby, the chance of obesity, diabetes and hypertension in the long term is also greatly increased. In summary, a balanced diet is essential for pregnant women.