The presumption of intake for methylmercury for a pregnant woman by methylmercury monitor of hair, mother's milk, and umbilical cord.

对鹿儿岛县M镇的252名母亲及其婴儿进行了甲基汞暴露对婴儿生长发育风险的调查。母亲头发总汞浓度的几何平均值为1.60ppm。随着哺乳时间的延长，母亲头发中总汞浓度呈下降趋势。根据回归系数计算，哺乳1个月后发汞浓度为1.065ppm。当产犊间隔短时，母亲头发中的汞浓度较高。母乳喂养时间较长，婴儿自己开始散步的时间较晚。

The risk on growth and development for methylmercury exposure to baby was examined by 252 of mothers and their babies at M town in Kagoshima Prefecture. The geometric mean of total mercury concentration of mother's hair was 1.60ppm. The total mercury concentration of mother's hair has decreased as the period of mother's milk giving long. It could be calculated that the hair mercury concentration of 1.065ppm had decreased by suckling mother's milk for one month according to the regression coefficient. When the calving interval is short, he mercury concentration of mother's hair is high. The lactations of mother's milk being longer brought the time of starting walking of the baby by oneself was late.