“…K. Lowe, 1993; Manning & Wright, 1983; Slade et al, 2000; Soet et al, 2003; Svensson et al, 2009) or were required to complete time intensive antenatal interventions to remain in the final sample for analysis (Backstrom & Hertfelt Wahn, 2011; Gau et al, 2011; Kennedy et al, 2011; Salmela-Aro et al, 2012; Sun, 2010; Vasegh Rahimparvar et al, 2012). A lack of information about percent recruited or evidence of low recruitment characterizes most of the literature reviewed, with only seven studies clearly documenting effective recruitment (Goutaudier et al, 2012; Hui Choi, 2012; Kennedy et al, 2011; Lowe, 1993; Salmela-Aro et al, 2012; Slade et al, 2000; Stockman, 2001). High attrition rates in several studies (24%–54%) suggest that study requirements often were untenable (Gau et al, 2011; Ip et al, 2009; Kennedy et al, 2011; Larsen et al, 2001; Salmela-Aro et al, 2012; Soet et al, 2003; Svensson et al, 2009).…”