0300-9041 0300-9041 S0300-90412018000500342 10.24245/gom.v86i5.2038 México México México 00 00 2018 00 00 2018 86 5 342 350

1 The Society of Obstetricians and Gynaecologists of Canada 2015 37 2 2 157-78 2 2011 3 231-41 3 2008 4 2000 6 6 6 588-94 5 2002 16 1691-6 6 2015 22 3 3 410-4 7 2014 26 12 12 8 2013 20 5 5 583-90 9 2014 21 5 5 928-34 10 183 2014 2014 183-7