My sister doesn't breast feed. Her daughter is 8 years old. I never breast fed with my youngest daughter. I'm not producing breast milk. My sister is. When she first had mirena in, for the first two minths she had really bad cramping and her period. Northing since then. Until she started producing breast milk. I did breast feed for almost a month with my oldest daughter when she was a baby. I was using Jolivet then. Will getting the Mirena out stop the production of breast milk for my sister.