When an ultrasound is done in the early stages of pregnancy, if fluid is seen in the uterine cavity, this condition may also be normal or there may be a possibility of preterm miscarriage. Under normal circumstances, there may be mucus in the uterine cavity, that is, there may be fluid after pregnancy because the fusion between the gestational sac and the meconium has not yet been complete, and this may also be seen during an ultrasound, that is, fluid in the uterine cavity, which is a normal physiological phenomenon and does not require treatment. There is also a possibility of pre-eclampsia, where the fetal membranes or placenta are separated from part of the endometrium, and there may be bleeding, which has not yet come out of the uterine cavity at this time. If the miscarriage is caused by pre-eclampsia, it can be treated with fetal preservation. Sometimes the fluid will be absorbed slowly after the successful preservation.