Transvaginal ultrasonography with bowel preparation is able to predict the number of lesions and rectosigmoid layers affected in cases of deep endometriosis, defining surgical strategy - Gonçalves, Manoel Orlando da C; Podgaec, Sergio; Dias Junior, João Antonio; Gonzalez, Midgley; Abrão, Maurício Simões (Human reproduction, 2010)