  Conversion of entangled states under (Stochastic) Local Operations and
Classical Communication admits the phenomenon of catalysis. Here we explore the
possibility of a copy of the initial state itself to perform as a catalyst,
which we call a self-catalytic process. We show explicit examples of
self-catalysis. Necessary and sufficient conditions for the phenomenon to take
place are discussed. We numerically estimate how frequent it is and we show
that increasing the number of copies used as catalyst can increases the
probability of conversion, but do not make the process deterministic. By the
end we conjecture that under LOCC the probability of finding a self-catalytic
reaction does not increase monotonically with the dimensions whereas SLOCC does
increase.
