Unconditional reference values for the amniotic fluid index measurement between 26w0d and 41w6d of gestation in low-risk pregnancies - Peixoto, Alberto Borges; Caldas, Taciana Mara Rodrigues da Cunha; Martins, Wellington de Paula; Costa, Fabricio da Silva; Araújo Júnior, Edward (The Journal of Maternal-Fetal and Neonatal Medicine, 2016)