The doctor, prompt please that the free liquid behind a uterus means. Mn...

[Svetlana]

The doctor, prompt please that the free liquid behind a uterus means. To me today did or made uzi and in a map such record.
It is not terrible??? From what it occurs or happens?

[Gorodetskaja M.D.]

You, probably, recently had an ovulation, or there is an inflammatory process.