The best time for micronutrient testing for pregnant women is in the middle of pregnancy. This is because a woman is generally not prone to micronutrient deficiencies during early pregnancy when the embryo is developing smaller and does not require as much nutrients. During mid-pregnancy as the fetus grows and develops faster, the need for nutrients increases, which may lead to deficiencies in trace elements such as iron, zinc, selenium and other trace elements. The lack of these trace elements may lead to the emergence of fetal malnutrition. Women should eat more food rich in protein, vitamins and trace elements during pregnancy, such as fish, shrimp, eggs, pork ribs, fresh vegetables and fruits. During pregnancy, as long as you do not eat cold and spicy, stimulating food can be, in addition to pregnancy must be on time to do a good job of obstetric examination.