Recently, I have been asked by mothers-to-be on WeChat groups: Doctor, I am pregnant, can I take the calcium tablets you have prescribed for me? Will it cause placental calcification? The internet says that taking calcium tablets can cause placental calcification. What is placental calcification first? The placental calcification is a commonly used grading of placental maturity under ultrasound: respectively, degree I: strong light spot seen in the placental section; degree II: strong light band seen in the placental section; degree III: strong light circle seen in the placental section. This phenomenon usually occurs after 33 weeks of pregnancy, and these bright spots are caused by focal placental infarction in late pregnancy. The mother-to-be, don’t be frightened by the word “infarction”, under normal circumstances, the ultrasound examination will find more or less 1 to 2 degrees of calcification of the placenta in late pregnancy or even after the expiration date, which is a normal phenomenon in this period and is an indirect manifestation of the fetus being nearly full term or expired. Calcification of the placenta does not necessarily result in loss of placental function and endanger the fetus. Except in the case of 3rd degree severe calcification and combined with low amniotic fluid or other abnormal symptoms, it may represent placental insufficiency, which may endanger the fetus, then it is necessary to consider induction of labor and termination of pregnancy. Next, why do we need to take calcium supplements during pregnancy? The role of calcium is not necessary to say, we all know very well that it is an essential component of the bones in the body. The fetus starts to grow from a single cell and finally grows into a mature fetus of 1250px. All the calcium needed for the bones in his/her body (from head to toe) is taken from the mother’s body. The great mother, everything is done first to the fetus, even if the mother is deficient in calcium, the fetus still has to draw a quantitative amount of calcium from the mother, which may lead to decalcification of the bones and teeth of the mother-to-be, causing back disease, leg disease, bone pain, convulsions and tooth loss, etc. In serious cases, osteochondrosis, pelvic deformation, and even cause obstructed labor. Therefore, it is necessary to be filled with calcium during pregnancy to meet the needs of the fetus and oneself. According to the recommendations of our nutrition society should be daily intake of calcium 1000mg, increased to 1500mg in late pregnancy. can take some calcium tablets, milk and milk products in the calcium is easily absorbed, should drink more. Therefore, mothers-to-be, don’t worry, calcium supplementation during pregnancy is very necessary, and it is completely irrelevant to placental calcification!