Calcium carbonate is the most effective calcium supplement during pregnancy, and it needs to be taken under the guidance of a doctor. Almost all of the calcium needed for fetal bone growth during pregnancy comes from the mother’s body, and since mid-pregnancy, it is necessary to appropriately increase the intake of calcium-rich foods, such as dairy products, and to follow the doctor’s instructions to supplement calcium supplements. Due to the low calcium content of Vitamin D calcium chewable tablets, it is easy to be absorbed by the stomach acid, while calcium carbonate calcium content is high and easy to be absorbed without the influence of stomach acid, so calcium carbonate calcium supplementation is the most effective. During pregnancy, it is necessary to increase dietary nutrition appropriately, reasonable and balanced diet, in order to ensure that the intake of sufficient nutrients to meet the physiological needs of the mother and the growth and development of the fetus required. Under the guidance of the doctor, you should also maintain appropriate physical exercise, such as walking, yoga, etc., in order to improve physical fitness and ensure appropriate weight gain during pregnancy.