Introduction. Placental corioangiomas are abnormal proliferation of choriotic tissue. The incidence of these placental tumors is 0.2-0.6%. Most of the placental chorioangiomas are small and are not associated with risk to the fetus. Larger corioangiomas, with a diameter greater than 4 cm, may have important fetal consequences. Methods. A 27-year-old patient whose pregnancy evolved without any complications with no associated pathology at the second marriage was in the family’s 10th week of amenorrhea, gave birth in a planned caesarean surgery at 37 weeks of gestation, indicating the diagnosis of placental corioangioma. The patient during the pregnancy was evaluated at ultrasound at 12, 21, 32, 34, and 38 weeks of gestation. She was investigated paraclinically according to the antenatal scrining program, the condition being considered as a healthy one. Up to the 25th weeks of gestation, the patient worked in harmful conditions, having direct contact with natural gas, which could have conditioned the appearance of the corioangioma. Results. Corioangiomas are benign tumors present as distinct masses formed by numerous stromalsupported fetal capillaries. Ecographically, the corioangioma appears well defined, heterogeneous, predominantly hypoecogenic in the vicinity of the umbilical cord insertion site along the fetal surface of the placenta, prominent in the amniotic cavity. Conclusions/Discussion. Corioangioma, being a benign tumor, usually has a beneficial evolution for the intrauterine development of the fetus, especially if it is small and does not show rapid growth. Fortunately, it can be visualized at prenatal ultrasound, allowing good dynamic monitoring. Likewise, ultrasound allows the development of fetal therapy and provides diagnostic information as well as intraoperative guidance. With improved surgical equipment and prenatal diagnostics, access to the maternal-fetal unit through minimally invasive methods will probably become more and more valuable and will provide new behavioral protocols for the treatment of the fetus when his development is obviously affected.