  We study the dynamical effects in the scale factors due to the scalar
$\phi$-field at the early stages of a supposedly anisotropic Universe expansion
in connection with the problem of the initial singularity in the scalar-tensor
cosmology of Jordan-Brans-Dicke. This is done by considering the behaviour of
the general analytical solutions for the homogeneous model of Bianchi type VII
in the vacuum case. We conclude that the Bianchi-VII$_0$ model shows an
isotropic expansion and that its only physical solution is equivalent to a
Friedman-Robertson-Walker spacetime whose evolution begins in a singularity and
ends in another; moreover, we obtain that the general Bianchi-VII$_h$ (with
$h\neq 0$) models show strong curvature singularities that produces a complete
collapse of the homogeinity surfaces to a 2-plane, to a string-like
one-dimensional manifold, or to a single point.
