Ovarian teratomas are common benign solid tumors of the ovaries and generally do not affect pregnancy in women. Ovarian teratomas are usually small; if they are under three centimeters, surgery may not be necessary, and regular ultrasound monitoring is sufficient. This is because small ovarian teratomas can be difficult to locate during surgery, and the procedure can cause some damage to the ovaries. However, in the following situations, it is advisable to treat the teratoma before attempting to conceive: First, if the teratoma is larger than five centimeters, it should be removed regardless of whether it is benign or malignant, as even benign teratomas can cause complications during pregnancy such as rupture, infection, or malignant transformation. Second, if the teratoma grows rapidly over a short period, this suggests the possibility of malignancy. In such cases, the teratoma should be surgically removed and sent for pathological examination before attempting to conceive.