@inproceedings{inproceedingsbb063317, title = {The use of the "purple line" as a supporting clinical method to evaluate the active stage of labor}, author = {Narchi, Nadia Zanon and Bertolino, Mariana and Bastos, Maria Helena}, year = {2010}, booktitle = {Congreso Interatlántico sobre Parto e Investigación en Salud Primal} }