Riesco MLG, Fernandes-Trevisan K, Leister N, Cruz C da S, Caroci A de S, Zanetti MRD. Urinary incontinence related to perineal muscle strength in the first trimester of pregnancy: cross-sectional study . Rev. Esc. Enferm. USP. 2014;48(spe):32-38. doi:10.1590/S0080-623420140000600005