Pregnant women can eat bird's nest during the whole pregnancy, but it is generally recommended to eat bird's nest in the first and third trimester, because this is an important stage related to fetal growth and delivery. In addition, bird's nest has high nutritional value. Eating bird's nest in moderation can not only supplement nutrition, promote metabolism, improve women's resistance, but also promote fetal brain development, which has many benefits for both fetus and pregnant women.