How long does pelvic fluid usually disappear in early pregnancy cannot be generalized and needs to be analyzed on a case-by-case basis. Pelvic fluid may occur in some women in early pregnancy, which may be physiological or pathologic. If the pelvic fluid is small and there is no obvious discomfort such as abdominal pain or anal distension, it is often considered to be physiologic pelvic fluid. This is mostly due to the discharge of follicular fluid into the pelvic cavity after the ovum is discharged. This condition usually requires no treatment, and the fluid will disappear on its own in a week or so. If it is accompanied by abdominal pain and the effusion is more than 2cm, it is considered that there is pelvic inflammation, and the inflammatory stimulation leads to the formation of effusion by inflammatory exudate. At this time, miscarriage is likely to occur, it is recommended to pay attention to more rest, try to stay in bed, to promote absorption. If the birth control is not successful, you need to take medication regularly after the abortion. The time for the effusion to disappear is related to the individual’s condition and may take more than half a month. In conclusion, if there is any obvious discomfort after pregnancy, it is recommended to consult a doctor in time to prevent delays.