It is best to eat it from pregnancy until the end of lactation, which is the best and good for pregnant women and children. Take a chestnut: Even if the pregnant woman's diet is very good and reasonable during pregnancy, the body will release some calcium from the bones and teeth into the blood for the children to use. If pregnant women do not lack vitamin D3 after giving birth, the body will absorb calcium from food and deposit it in bones and teeth. If the mother is in a state of vitamin D3 deficiency, it is a pity that calcium deposition will not come back, and bones and teeth will begin to lack calcium. Problems began to appear slowly, and there were some problems with bones and teeth. Although there are few nutrients, it has a great influence. Pregnant women should pay attention to their own and their children's health problems and supplement vitamin tablets as soon as possible.