Gameiro, Mônica Orsi, Vanessa Oliveira Sousa, Luiz Felipe Gameiro, Rosana Carneiro Muchailh, Carlos Roberto Padovani, and João Luiz Amaro. 2011. “ Comparison of Pelvic Floor Muscle Strength Evaluations in Nulliparous and Primiparous Women: A Prospective Study ”. Clinics 66 (8): 1389-94. https://doi.org/10.1590/S1807-59322011000800014.