First, what is a teratoma? Teratoma is a common ovarian tumor in gynecology, with a very high incidence rate. It is generally benign and the occurrence of teratomas is related to congenital genetic factors. Generally, if a teratoma is found, the first step is to check the size of the teratoma. If it is smaller than five centimeters, tumor series tests are normal, and there is no other discomfort, observation can be initiated. If the teratoma is relatively large, larger than five centimeters, surgical intervention is required. Teratomas themselves are not related to pregnancy, but because teratomas can lead to ovarian cyst torsion, after torsion occurs, one side of the adnexa may need to be removed, which could reduce fertility.