Bird’s nest is most effective for women during the first trimester of pregnancy, followed by the second trimester. During the first trimester of pregnancy, the organs of the fetus are at the stage of formation, which is very critical. However, at this time, most pregnant women will have certain pregnancy reactions, and their appetite will often decrease, and the decrease in the amount of food they eat will often lead to nutritional deficiencies. Eating some bird’s nest at this time can reduce pregnancy reaction and help strengthen the resistance of pregnant women. In the second trimester of pregnancy, the fetus grows faster, and bird’s nest is rich in nutrients, which can not only replenish the nutrients needed by the pregnant woman herself, but also provide enough nutrients for the normal growth and development of the fetus.