Quiroga de Michelena, M.I. and Díaz Kuan, A. 2016. Prenatal diagnosis of chromosome abnormalities Noninvasive prenatal testing. The Peruvian Journal of Gynecology and Obstetrics . 62, 3 (Oct. 2016), 265–268. DOI:https://doi.org/10.31403/rpgo.v62i1921.