Adjustment Finally, if there were to be a specific added risk of obesity to the child from an in utero influence, a stronger association of the child’s BMI with maternal obesity than with paternal obesity would be expected. Relatively few studies have both maternal and paternal weight data available but, when considered, several have shown a stronger association of maternal than paternal BMI with offspring BMI (Salsberry and Reagan 2005; Lawlor et al. 2007; Lawlor et al. 2008; Catalano, Farrell et al. 2009). In one of these, however, this was reported to be explicable by inheritance of the variant of the FTO gene association with obesity (Lawlor et al. 2008).