Reference ranges of Doppler parameters of foetal pulmonary artery segments between 19 and 39 weeks of gestation - Herren, Helmer; Araújo Júnior, Edward; Martins, Wellington de Paula; Cavalli, Ricardo de Carvalho; Marcolin, Alessandra Cristina; Costa, Fabricio da Silva; Quintana, Silvana Maria; Duarte, Geraldo (Journal of Maternal-Fetal and Neonatal Medicine, 2016)