  The origin of pulsar kicks is reviewed in the framework of the spin-flip
conversion of neutrinos propagating in the gravitational field of a magnetized
protoneutron star. We find that for a mass in rotation with angular velocity
${\bbox \omega}$, the spin connections entering in the Dirac equation give rise
to the coupling term ${\bbox \omega}\cdot {\bf p}$, being ${\bf p}$ the
neutrino momentum. Such a coupling can be responsible of pulsar kicks owing to
the neutrino emission asymmetry generated by the relative orientation of ${\bf
p}$ with respect to ${\bbox \omega}$. For our estimations, the large non
standard neutrino magnetic momentum, $\mu_\nu \lesssim 10^{-11}\mu_B$, is
considered.
