[en] A lower bound on the contribution of 2nth-order perturbation theory to the two-point function for 0 < or = D < 4 (D is the number of spatial dimensions) is given; for zero mass (Pomeranchuk) the lower bound is c/sub n/g/sub n/(nexclamation)/sub D/, while for nonzero mass (intercept below 1) it is c/sub n/g/sub n/nexclamation, where g is the coupling constant and c is an appropriate constant. Subtraction of divergences or restricting ourselves to skeleton diagrams does not change the type of behavior of these terms