| PROGESTASERT | MIRENA |
| Progesterone | Levonorgestrel |
| 40 mg progesterone | 40 mg LNG |
| Release 65 microgm/day | 20 microgm/day |
| Effective for 1 yr | 5 yrs |
| Ectopic pregnancy more | Ectopic pregnancy less |
As far as i know mirena has 52mg of levonorgestrel
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