Core tip: The standard supply of calcium for pregnant women in the first trimester is 800 mg per day, 1,000 mg per day in the second trimester, and 1,200 mg per day in the third trimester. Chen Qin, deputy chief physician of the Perinatal Nutrition Clinic of Guangzhou Women and Children\’s Medical Center, believes that many pregnant mothers do not pay attention to calcium supplementation during pregnancy, which will have a greater impact on the fetus and the pregnant woman herself. Calcium supplementation during pregnancy should also be properly coordinated. Don\’t rely solely on calcium tablets or milk. Guiding Expert: Chen Qin Guangzhou Women and Children’s Medical