Snell, BJ (Nov–Dez 2009). «Assessment and management of bleeding in the first trimester of pregnancy.». Journal of midwifery & women's health. 54 (6): 483–91. PMID19879521. doi:10.1016/j.jmwh.2009.08.007
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Snell, BJ (Nov–Dez 2009). «Assessment and management of bleeding in the first trimester of pregnancy.». Journal of midwifery & women's health. 54 (6): 483–91. PMID19879521. doi:10.1016/j.jmwh.2009.08.007