Ovarian teratoma is a type of gynecological disease, originating from germ cells, and is a relatively common type of ovarian germ cell tumor. It can be divided into mature teratomas and immature teratomas. As for the impact of ovarian teratomas on the fetus, it depends on the size and type of the teratoma, as well as the parts it involves, especially teratomas of the testes and ovaries that involve male and female reproductive functions. When suffering from an ovarian teratoma, it is advisable to undergo surgery actively, and to plan for pregnancy after the disease is cured, in order to ensure the healthy development of the fetus.