  In the analysis of PDEs, regularity of often measured in terms of Sobolev,
H{\"o}lder, Besov or Lipschitz spaces, etc. However, sometimes a gain of
regularity can also be expressed just in terms of Lebesgue spaces, by passing
from a singular setting to a less singular one. In this article we will obtain
a gain of integrability for weak solutions of the micropolar fluid equations
using as general framework Morrey spaces, which is a very useful language to
study regularity in PDEs. An interesting point is that the two variables of the
micropolar fluid equations can be studied separately.
