Coronavirus disease 2019 infection severity among different variants in children under 2-years old in Brazil Beatriz Martinelli Menezes Gonçalves; Rossana P.V. Francisco; Ágatha S. Rodrigues; José Carlos Soares Junior;

Uterine artery doppler and pregnancy-associated plasma protein-A in pregnancies with fibroids Lida Anwari;

Characteristics of the oral glucose tolerance test in women with different pre-pregnancy body mass index and the effect of gestational diabetes mellitus on twin pregnancy outcomes Jinying Luo; Xiaoyan Geng; Jinfu Zhou; Shengnan Liang; Wei Zheng; Guanghui Li;