PERSISTENT CYST

MY HX IS LEFT OVARY REMOVED DUE TO DERMOID IN 2005 AND BRENNER TUMOR 2006.BOTH BENIGN. NOW I'VE HAD A 1 CM CYST RT. OVARY  SINCE APRIL 07.WE HAVE BEEN FOLLOWING THIS WITH ULTRASOUND EVERY 2-3 MONTHS.REALLY HASN'T CHANGED ALOT.AS OF 2 WKS AGO IT IS AT 1 CM. NO FLUID SEEN OR CALCIFICATIONS. DR. HAS AGREED TO HAVE ONE MORE ULTRASOUND IN DEC. BEFORE SURGERY. HOW LONG IS IT REASONABLE TO FOLLOW THESE CYSTS. I AM 52 YRS OLD. ALSO HAVE SMALL FIBROIDS CAUSING ALOT OF BLOATING.I'M  AFRAID I'M STALLING THIS SURGERY AND IT MIGHT BE SERIOUS.HE THINKS IT'S OKAY PLEASE GIVE YOUR OPINIONS. THANK YOU..