A large gestational sac with small buds may be related to the embryo stops developing, fertilized egg implantation time is late and other factors, it is recommended to pay attention to timely. 1. Embryonic arrest: usually, normal embryonic development is not a symptom of large gestational sacs and small buds, usually appear after the appearance of the fetal sacs of women’s pregnancy buds, and with the supply of nutrients to the development of the fetus and then appear fetal heart. According to the normal growth and development, this kind of symptom is abnormal, may be related to the embryo stops developing. 2. Late fertilization time: large gestational sacs and small buds may also be due to late fertilization time, usually with the female ovulation cycle late, long menstrual cycle and other reasons, there is a small buds and large gestational sacs. There may also be other reasons for a large gestational sac and small buds, so it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.