Evolution as a function of the scale factor a(t) of the average modulus of the gravitational field created by antimatter in the D–M universe. The scale factor is normalized such that at the present epoch the scale factor a = 1. At our epoch, the value of the average modulus of the antimatter gravitational field is of a few 10⁻¹¹ m s⁻², leading to a value of the a₀ acceleration parameter similar to that postulated by MOND.