6Kishor T, Parag P, Vinod A, et al. Chorioangioma of Placenta: Sonographic Features. J Clin Ultrasound, 2008, 2 : 113-115.
7Quarello E, Bernard JP, Leroy B, et al. Prenatal laser treatment of a placental ehorioangioma. Ultrasound Obstet Gynecol, 2005, 25:299-301.
8Lau TK, Leung TY, Yu SCH, et al. Prenatal treatment of chorioangioma by microcoil embolisation. B JOG, 2003, 110 : 70- 73.
9Nicolini U, Zuliani G, Caravelli E, et al. Alcohol injection: a new method of treating placental chorioangiomas. Lancet, 1999, 353 : 1674-1675.
10[3]Reshetnikova OS,Burton GJ,Miloranov AP,et al.Increased incidence of placental chorioangioma in high - altitude pregnancies:hypobaric hypoxia as a possible etidogictor.Am J Obstet Gynecol,1996,174:556-557