0874-6885 0874-6885 S0874-68852020000200137 10.34619/ndv9-wk58 Portugal 31 12 2020 31 12 2020 44 137 153

2010 2005 1007-24 2009 19 87-110 2020 2018 8-13 1988 24 93-106 2017 367-83 1979 2004 2010 1 2 2006 2015 2003 2002 2018 27-34 WHO Reproductive Health Library 2018 WHO Reproductive Health Library 2018 1992