  We show that certain models for neutrino masses that lead to the MSW
explanation of the solar neutrino data and/or the hot dark matter component in
the universe can also naturally allow for the successful generation of the
cosmological baryon asymmetry at the electroweak scale. This follows either
because the experimental Higgs boson mass limit is weakened due to the smaller
production rate and the presence of sizeable invisible decays involving majoron
emission, or due to the effect of additional electrically charged scalar bosons
which substantially modify the condition for succesful baryogenesis.
