“…It is likely there are variables that warrant further exploration which are not analysed here because of insufficient evidence. For example, cognitive appraisals after birth (Ford et al, 2010;Vossbeck-Elsebusch et al, 2014), anxiety sensitivity (Keogh, Ayers, & Francis, 2002;Verreault et al, 2012) and insomnia (Garthus-Niegel, Ayers, von Soest, Torgersen & Eberhard-Gran, 2014) all appear promising but there was not enough evidence to include them in the metaanalysis. Future research should therefore consider other variables, such as these, which are not included in this review.…”