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We review our knowledge of the origin and phenomenology of low states (alsoknown as VY Scl states) in cataclysmic variables, making special emphasis onthe cataclysmic variable population found just above the period gap. Thisorbital period range between approximately 3 and 4 hours is the preferred landfor the elusive SW Sextantis stars, which are believed to be about to enter thegap when their donor stars become fully convective. Despite their main role inour understanding of the whole picture of cataclysmic variable evolution, thestudy of their component stars is almost impossible due to the extreme veilingbrightness of the accretion disc during the high state. Here we present thefirst steps toward the characterisation of the white dwarfs and the donor starsin these VY Scl systems in the low state, and the discovery of sporadicaccretion events and satellite emission lines like those observed in the AM Hersystems in the low state, which are likely related to magnetic activity of thefast rotating secondary stars.

The low states of CVs at the upper edge of the period gap