1
Published 2013
Royal College of Obstetricians and Gynaecologists

2
Published 2013
Royal College of Obstetricians & Gynaecologists

3
Published 2013
Royal College of Obstetricians and Gynaecologists

5
Published 2011
RCOG Press at the Royal College of Obstetricians and Gynaecologists

6
Published 2017
National Institute for Health and Care Excellence

7
Published 2017
National Institute for Health and Care Excellence

8
Published 2017
National Institute for Health and Care Excellence

11
Published 2008
RCOG Press

13
Published 2011
RCOG Press at the Royal College of Obstetricians and Gynaecologists

16
Published 2012
Published by the RCOG at the Royal College of Obstetricians and Gynaecologists

17
Published 2009
RCOG Press

18
Published 2007
RCOG Press

20
by Welsh, Andrew
Published 2010
Royal College of Obstetricians and Gynaecologists