  CP violation is a crucial component in the creation of the matter - anti
matter asymmetry of the universe. An important open question is whether the CP
violating phenomena observeable in terrestrial experiments have any relation
with those responsible for baryogenesis. We discuss two mechanisms of
baryogenesis where this question can be meaningfully posed: ``electroweak
baryogenesis'' and ``baryogenesis via leptogenesis''. We show how these
scenarios can be constrained by existing and forthcoming experimental data. We
present a specific example of both these scenarios where the CP violating phase
in the Cabbibo Kobayashi Maskawa matrix is related in a calculable way to the
CP violating phase responsible for baryogenesis.
