Reference ranges for the left ventricle modified myocardial performance index, respective time periods, and atrioventricular peak velocities between 20 and 36 + 6 weeks of gestation - Peixoto, Alberto Borges; Bravo-valenzuela, Nathalie Jeanne; Martins, Wellington Paula; Mattar, Rosiane; Moron, Antonio Fernandes; Araujo Júnior, Edward (Journal of Maternal-Fetal & Neonatal Medicine, 2021)