Low protein during pregnancy has the following conditions: 1, the amount of protein required for fetal growth, the pregnant woman’s intake is low, showing hypoproteinemia, need to increase nutrition appropriately under the guidance of physicians; 2, pregnancy complications and complications: pregnancy combined with hypertension, nephritis patients protein leakage from the kidneys, manifested as proteinuria, hypoproteinemia, need symptomatic treatment; 3, malnutrition: relatively weak, sickly patients; 4, gastrointestinal diseases: accelerated protein breakdown and reduced synthesis, such as patients with severe hepatitis.