  A detailed analysis of processes of the type NN -> d\pi is presented taking
into account the exchange graphs of a nucleon and a pion. A large sensitivity
of polarization observables to the off-mass shell effects of nucleons inside
the deuteron is shown. The influence of the inclusion of the P-wave in the
deuteron wave function (DWF) is studied. We have analyzed the sensitivity of
all the observables to the form of \pi NN - current taking into account the
off-shellnis of the nucleon and the choice of the DWF relativistic form. From
the results one can see the very large sensitivity of all the observables,
especially of the polarization characteristics to the choice of the DWF form.
