Pelvic fluid in early pregnancy may be a normal physiological phenomenon, normally most people can see a small amount of fluid in the pelvic cavity during ultrasound, and this fluid is used to lubricate the abdominal organs, so it usually does not need treatment. If you are pregnant and have no discomfort or lower abdominal pain, it is a normal physiological phenomenon and close observation is sufficient. However, if there is a tear-like lower abdominal pain, ultrasound to see fluid in the pelvis, while the uterine cavity can not see the gestational sac, we must be highly alert to whether the rupture of ectopic pregnancy, the need for further examination, at this time you can do the posterior fornix puncture, to see the pelvic fluid is not blood can be diagnosed.