Fluid accumulation around the gestational sac may be caused by physiological accumulation of fluid during the process of implantation or the occurrence of preeclampsia. 1. Physiological fluid accumulation: the fertilized egg in the process of endometrial lining, may lead to endometrial blood vessel rupture bleeding caused by a small amount of fluid around the gestational sac, this situation is normal, it is recommended that do not need to be overly nervous. 2. Pre-eclampsia: If a pregnant woman is affected by various adverse factors in the early stages of pregnancy, or if the embryo itself is genetically abnormal, it may cause the embryo to detach itself and bleed from the endometrium at the place of attachment, resulting in fluid accumulation around the periphery of the gestational sac. Pregnant women in the early stages of pregnancy should pay attention to more rest, more nutrition, if at any time there is abdominal pain or abnormal vaginal bleeding, etc., must seek medical attention as soon as possible.