Male body mass index ( BMI ) was higher in couples who failed to conceive ( 29.5 kg/m ( 2 ) vs 28.2 kg/m ( 2 ) ; P = .039 ) as well as those who did not achieve a live birth ( 29.5 kg/m ( 2 ) vs 28.1 kg/m ( 2 ) ; P = .047 ) .