Ovarian cysts form as a result of a drastic hormonal imbalance which causes a failed ovulation.  But the truth is, it is very difficult to state categorically that only a hormonal imbalance is the cause of ovarian cysts.  There are probably several other contributing factors.  The reason natural or holistic cures for ovarian cysts are so effective is that they treat the whole body, not just the symptom.  Once the entire body is restored to health, then the underlying cause of the cyst is removed and not only does the cyst go away, but the chances of developing further cysts is remote.
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