The best time for pregnant women to supplement calcium is 4 ~ 6 months in the second trimester. Take calcium tablets once a day after meals or before going to bed. If calcium deficiency is serious, take them twice. Taking calcium tablets for pregnant women is an important part of ensuring health during pregnancy. When choosing calcium tablets, pregnant women should pay attention to the safety, solubility, cost performance and taste of calcium tablets, and also consider the absorption rate of the body. In addition, we should pay attention to the methods of eating calcium tablets.

If the gastrointestinal function of pregnant women is not very good, it is best not to choose calcium carbonate when choosing calcium tablets, because calcium carbonate is not easily absorbed in acidic environment. It is suggested that pregnant women with poor gastrointestinal function should try to choose calcium lactate and organic calcium. Although this calcium may contain a small amount of calcium, its absorption rate will be higher for people with poor gastrointestinal function.

In addition, pregnant women who are often constipated should not choose inorganic calcium when supplementing calcium, because inorganic calcium is not easily absorbed, which will lead to a lot of precipitation, which will directly aggravate the problem of constipation. It is suggested that pregnant women with constipation should try to choose calcium tablets with high amino acid content, because such calcium tablets are more conducive to gastrointestinal absorption.