  We show that the bulk Dresselhauss ($k^3$) spin-orbit coupling term leads to
an intrinsic spin-Hall effect in n-doped bulk GaAs, but without the appearance
of uniform magnetization. The spin-Hall effect in strained and unstrained bulk
GaAs has been recently observed experimentally by Kato {\emph{et. al.}}
\cite{kato2004A}. We show that the experimental result is quantitatively
consistent with the intrinsic spin-Hall effect due to the Dresselhauss term,
when lifetime broadening is taken into account. On the other hand, extrinsic
contribution to the spin-Hall effect is several orders of magnitude smaller
than the observed effect.
