In gynecology, teratomas are a very common type of ovarian cyst. If a teratoma is discovered during the pre-pregnancy period, its size should be considered. If the teratoma is larger than five centimeters in diameter and is accompanied by abnormalities on a CT scan, it is recommended to undergo surgery before attempting to conceive. If the teratoma is very small, such as two to three centimeters in diameter, it does not affect future pregnancy. If a teratoma is discovered during early pregnancy, opinions vary. Some recommend surgical treatment after the first trimester, while others suggest a pregnancy observation plan. Teratomas during pregnancy are prone to complications such as ovarian cyst torsion, which can cause abdominal pain. Therefore, if you have a teratoma and successfully conceive, be mindful of any pain.