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If you are having the bleeding around your ovulation time, it could indicate that IUI did not work. Visit your doctor/gynecologist for thorough evolution to look for the underlying cause. IUI works better if done along with ovulation inducers and HCG trigger injections. If IUI cycles fail, other techniques like IVF or ICSI can be tried. Be in regular follow-up and monitoring of your treating doctor/gynecologist and discuss about further treatment options to help you get pregnant.
Take care.