Corpus luteum cyst are one of the three main ovarian cyst varieties. This type can happen around a pregnancy, and doesn't necessarily need treatment. The hemorrhagic cyst is the most common of the ovarian cysts. Dermoid cysts are the one type of ovarian cyst that normally requires treatment. You can find more information here: http://www.ovarian-cysts.com/articles/ovarian-cyst-types/index.php
