1. Legal abortion worldwide: incidence and recent trends;Sedgh;Perspect Sex Reprod Health,2007
2. Federal Council of Medicine Resolution N° 1.989/2012. Published at D.O.U. 2012 May; Section I: 308-309 http://www.portalmedico.org.br/resolucoes/CFM/2012/1989_2012.pdf
3. Silva R.S. Morell M.G.G. The extent women in the city of São Paulo resort to induced abortion 2002
4. Sex and life: overview of reproductive health in Brazil (in Portuguese);Rocha,2003
5. Ministry of Health Division of Science Technology and Strategic Resources Department of Science and Technology Twenty years of abortion research in Brazil http://bvsms.saude.gov.br/bvs/publicacoes/livreto.pdf