  The production rate of the CP-odd Higgs boson in the Minimal Supersymmetric
Standard Model is evaluated through next-to-leading order in the strong
coupling constant. The divergent integrals are regulated using Dimensional
Reduction, with a straightforward implementation of $\gamma_5$. The result is
confirmed within Dimensional Regularization where $\gamma_5$ is implemented
according to the Standard Model calculation of Chetyrkin et al. The well-known
Standard Model result is recovered if the masses of the supersymmetric
particles tend to infinity.
