  In this talk we review the actual situation concerning electroweak phase
transition and baryogenesis in the minimal supersymmetric extension of the
Standard Model. A strong enough phase transition requires light Higgs and stop
eigenstates. For a Higgs mass in the range 110--115 GeV, there is a stop window
in the range 105--165 GeV. If the Higgs is heavier than 115 GeV, stronger
constrains are imposed on the space of supersymmetric parameters. A
baryon-to-entropy ratio is generated by the chargino sector provided that the
$\mu$ parameter has a CP-violating phase larger than $\sim$ 0.04.
