There is no normal range for fluid in the uterine cavity in early pregnancy, and any fluid in the uterine cavity in early pregnancy is abnormal. Uterine fluid in early pregnancy is generally called mild when it is less than one-third of the gestational sac, moderate when it is between one-third and one-half, and severe when it is greater than one-half. When the discovery of uterine fluid during pregnancy, need to rule out ectopic pregnancy, such as intrauterine pregnancy, first of all to ultrasound to understand the embryo or fetal heart is normal, such as the embryo is normal can be actively preservation of pregnancy treatment. You can use progesterone capsules, dydrogesterone tablets and other treatments, and you need more bed rest, prohibit sexual intercourse. Early pregnancy uterine fluid need to be under the guidance of the doctor to use drugs, not blindly self-medication, in order to avoid adverse effects.