The high fetal motility is not necessarily related to calcium deficiency. The fetal power is within the normal range, whether it is high or low. Generally after 20 weeks of pregnancy can feel the fetal movement, before 26 weeks there is no regularity an hour generally 3-5 times more than the fetal movement or 12 hours more than 30-44 is normal, there is a possibility that the external sound is relatively large, affecting his activities, mid-pregnancy we should test whether the blood calcium ion becomes low, blood calcium is too low in time to supplement calcium.