The ultrasound examination of women after pregnancy, suggesting a large gestational sac, is usually not harmful, as long as the fetal yolk sac, fetal heart and fetal bud are growing and developing normally at this time, it will not affect the fetus, so there is no need to worry about it in particular. The large gestational sac indicates the following problems: 1. The large gestational sac indicates that the ovulation may be early and the early ovulation leads to the early implantation of the fertilized egg, so the gestational sac will be larger than the one calculated at the time of menopause, which is a normal phenomenon; 2. The large gestational sac also indicates the good quality of embryonic development, adequate nutrition during pregnancy, the woman’s physical quality and the good environment of the uterus; 3. The large gestational sac does not exclude the possibility of twins or misremembering the last menstruation. The large gestational sac does not exclude the possibility of twins or misremembering the last menstrual period. If you have a large gestational sac, it is recommended to go to the hospital for an ultrasound examination when you are about six weeks pregnant, and you can review it once after two weeks. During pregnancy, you should do well in all pregnancy examinations, keep a good mood, eat a reasonable diet, eat more fresh vegetables and fruits, eat less spicy and stimulating food, eat less cold and raw food, do not drink coffee and drinks, exercise properly every day to avoid infection, and ensure rest and sleep.