Fluid accumulation around the gestational sac may be a normal physiological phenomenon, or it may be a manifestation of certain diseases, such as abnormal corpus luteum function, abnormal embryo quality, etc. It is recommended to consult a doctor for examination in time. 1. Normal physiological phenomenon: the amount of effusion is small, usually a small amount of effusion after the fertilization of the egg, which is a normal physiological phenomenon, if there are no abnormal symptoms, do not need special treatment. 2. Abnormal luteal function: the luteal gland of pregnant women secretes insufficient estrogen and progesterone, and the secretory changes in the endometrium are insufficient, which may lead to a decrease in progesterone, and when the progesterone level decreases, it causes bleeding from the gestational sac, which may be manifested as effusion next to the gestational sac. 3. Abnormal embryo quality: Due to poor sperm or follicle quality, abnormal thyroid function, and various viral infections that cause abnormal bleeding of the gestational sac during its growth and development, the examination shows that there is effusion next to the gestational sac. There are other factors that may cause fluid accumulation around the gestational sac. It is recommended to consult a doctor in time, complete the relevant examinations, and actively deal with the problem under the guidance of a specialist, and do not use medication on your own to avoid delays.