I have the Merina IUD for 1 year in September. Upon receiving the IUD, my cycles disappeared apex 3 to 4 months later. On the 1 year anniversary, they returned. I have had 2 cycles now. Is this normal? Should I be concerned? I'm sure it is still inserted. I've had no side effects except weight gain. I do have Graves Disease and they are very light. knly light to heavy spotting for 3 days max. Any information you can share would be appreciated. TIA!