Hi shaddy; welcome to HealthcareMagic The ovarian cyst is not normal but please understand that in females it occurs and mostly if it is a simple cyst it resolves on its own after menstrual cycle.In some females it becomes a poly cystic ovary disease(PCOD) which can give rise to irregularity in menses .It requires treatment after which the cyst go away and menses become regular .Only in a very small percentage of females extensive treatment may be required.Please consult a Gynaecologist if required and also if you feel it necessary and can do it please repeat the Ultra sound after periods. Thanks