<unk> s are a normal part of the menstrual cycle. They can, however, grow to almost 10 cm (4 inches) in diameter and have the potential to bleed into themselves or twist the ovary, causing pelvic or abdominal pain. It is possible the cyst may rupture, causing internal bleeding and pain. This pain typically disappears within a few days of the rupture. If the<unk><unk>  becomes large it may cause ovarian torsion, where the ovary twists and blood flow is cut off. Ovarian torsion is rare and is accompanied by severe pain.
Corpus luteum cyst
Ovarian fibroma
Theca lutein cyst
Follicular cyst of ovary
Paraovarian cyst
Ovarian cyst
Seminoma
Ovarian serous cystadenoma