Electroweak baryogenesis and the Higgs and stop masses

In this talk we review the actual situation concerning electroweak phase tr ansition and baryogenesis in the minimal supersymmetric extension of the St andard Model. A strong enough phase transition requires light Higgs and sto p eigenstates. For a Higgs mass in the range 110-115 GeV, there is a stop w indow in the range 105-165 GeV. If the Higgs is heavier than 115 GeV, stron ger constrains are imposed on the space of supersymmetric parameters. A bar yon-to-ent ropy ratio is generated by the chargino sector provided that the mu parameter has a CP-violating phase larger than similar to 0.04.