Creation of universes from the third-quantized vacuum

We calculate the average numbers of closed, flat, and open universes spontaneously created from nothing in the third quantization. The creation of universes is exponentially suppressed for large values of the kinetic energy of the inflaton, while for small kinetic energies, it is exponentially favored for closed universes over flat and open ones: for a scale of inflation less than about 2 x 10(16) GeV, the ratio of the number of closed universes to either the number of flat or open universes is n(closed)/n(flat),(open) greater than or similar to 10(1010).