Costa, Edina Silva, Gigliola Marcos Bernardo Pinon, Tarciana Sampaio Costa, Raionara Cristina de Araújo Santos, Arieli Rodrigues Nóbrega, and Leilane Barbosa de Sousa. 2010. “Physiological Alterations from the Pespective of Women in Pregnancy”. Rev Rene 11 (2). http://www.periodicos.ufc.br/rene/article/view/4532.