[Dynamics of contents of chemical elements in fetal liver, and its physiological and nutritional significance].

The dynamics of contents of chemical elements in fetal liver, and its physiological and nutritional significance are studied. Twenty-one chemical elements in livers of fetus from induced abortion aged four to ten months are measured and are compared with those in adult. The relativity between the monthly average contents of twenty-one elements and fetus month age are analyzed and assorted. The results show that the contents of chemical elements of fetus liver are not well distributed and are not stable during the stage of fetus growth, and even change following the fetus's age. The changing patterns of contents of chemical elements of fetus liver can be divided into three types: a marked positive relativity of some chemical element contents with the increase in fetus age, marked negative relativity with the increase of fetus age, and indefinite relativity with the increase of fetus age. In the time period of embryo development to fetus to newborn infant, the content of some elements that has marked positive relativity with the increase of fetus age varies from low to high, indicating an increase of their contents in liver of fetus while supplying the need of fetus growth. The content of elements that have marked negative relativity with the increase of fetus age varies also from low to high and rapidly decreases in per unit tissue, resulting in an increase of the sensitivity to deficiency of these elements. The contents of elements that have indistinctive relativity with the increase of fetus age may not bring about any impact to fetus and newborn infant from the view of physiology and nutrition.