  We study ${\cal N}=2$ SU(2) supersymmetric QCD with massive hypermultiplets
deformed in the Nekrasov-Shatashvili limit of the Omega-background. The
prepotential of the low-energy effective theory is determined by the WKB
solution of the quantum Seiberg-Witten curve. We calculate the deformed
Seiberg-Witten periods around the massless monoplole point explicitly up to the
fourth order in the deformation parameter.
