1130-5274 1130-5274 S1130-52742018000300006 10.5093/clysa2018a21 España España USA 00 00 2018 00 00 2018 29 3 147 150

American College of Obstetricians and Gynecologists (ACOG) 2015 125 1268-71 2000 49 272-82 2001 50 155-64 2002 2005 16 331-8 1987 150 782-6 2000 2001 158 213-9 2002 32 509-15 2001 16 606-13 2010 202 5-14 2001 2nd ed. 2018 62 36-41 2011 14 227-38 2013 16 67-77 2014 1-7 2017 215 101-5 2010 36 950-7