It is unlikely to cause problems during pregnancy, but you need to monitor the size of the cysts by serial ultrasound examinations to see if it is increasing in Size ....an FNAC or Trucut biopsy ( both are outpatient procedures with are done in 10 minutes ) will tell us the exact constitution of the cyst if it is benign or not...
Next Steps
monitor the cyst size get an FNAC or Trucut biopsy if it increases in size