  In this study, we use the concept of Bohmian trajectories to present a
dynamical and deterministic interpretation for the gravity induced wave
function reduction. We shall classify all possible regimes for the motion of a
particle, based on the behavior of trajectories in the ensemble and under the
influence of quantum and gravitational forces. In the usual approaches all
information are obtained from the wave function evolution. But, on the basis of
Bohm's deterministic quantum theory, we can investigate the motion of particle
during the reduction processes. This leads to analytical and numerical results
for the reduction time and equation of motion of the particle. In this regard,
a new meaning will be provided for the reduction time.
