Do you mean when on progesterone
capsules? Are the suppositories
yellow? The progesterone suppository
capsules I was prescribed were white and powdery if you opened the capsule, like powdered sugar in appearance. They did give me lots of messy discharge, but it was certainly not yellow -- it was chalky, sticky and white. Maybe there are different types of progesterone suppositories, but the idea of the discharge being yellow and smelling seems very unusual.