The gestational sac is formed after the fertilized egg is laid, so the gestational sac is mainly referred to the fertilized egg is laid, most people usually do not have very obvious symptoms, a few people may have nausea and vomiting, breast swelling and pain, abdominal discomfort, low fever, drowsiness, bleeding, etc. 1, nausea and vomiting: some pregnant women feel like vomiting or regurgitation in the first few weeks after the fertilized egg is laid; 2, breast swelling and pain: the first few days after the fertilized egg is laid After the body gradually adapts to the large amount of hormones, the pain will gradually subside and the symptoms of physical or breast discomfort may disappear; 3, fatigue: the large amount of luteinizing hormone secretion will make pregnant women feel exhausted; 4, increased urination: after the fertilized egg is laid in the uterine wall, it will start to secrete human chorionic gonadotropin, and this stimulation will lead to frequent urination, compared to the pre-pregnancy urination; 4, increased urination: after the fertilized egg is laid in the uterine wall, it will start to secrete human chorionic gonadotropin. This stimulation will lead to frequent urination and an increase in the number of urination compared to the pre-pregnancy period; 5. Bleeding and cramping: there may be slight pink or brown bleeding, which may be accompanied by cramping; 6. Abdominal discomfort: it is manifested as a tingling sensation in the small abdomen, but the intensity of the pain is usually not great and the pregnant woman may feel slightly uncomfortable; 7. Hypothermia: some pregnant women may show hypothermia after the fertilized egg is laid because of the hormonal changes in the body; 8. Drowsiness: some Pregnant women may have the performance of being easily sleepy and sleepy. Because everyone’s body is different, the symptoms are not the same and there are individual differences. The above symptoms are possible manifestations of the fertilized egg after implantation, but they are not the criteria for determining whether the fertilized egg is implanted or not, and the final diagnosis needs to be confirmed by going to the hospital for relevant imaging and blood tests.