Pregnant women who eat too much once in a while do not have much effect on the fetus, but if they eat too much for a long period of time may have an effect, and at the same time may cause damage to the pregnant woman. If a pregnant woman eats too much for a long period of time, it will cause over-nutrition, which will make the fetus too big and become a huge baby, and may cause intrauterine hypoxia, difficult labor, clavicle fracture, intracranial hemorrhage, nerve damage, and other symptoms, which may cause the death of the fetus in serious cases. For pregnant women, eating too much for a long time may cause obesity during pregnancy, gestational diabetes and other diseases, and may cause birth canal damage, postpartum hemorrhage and other complications during delivery. Therefore, pregnant women should maintain a balanced nutrition during pregnancy, and if they suspect that there is a giant baby, it is recommended that they go to the hospital in time for examination and treatment.