Could the birth control mirena (levonorgestrel) give you a false negative result on a urine test? I already have a toddler that I conceived on birth control and im afraid it has happened again.

I'm . I'm not quite sure i understand your question, but i will try to answer as best as i can. Mirena (levonorgestrel) is a 5 year iud that is coated with a small amount of hormone. Mirena (levonorgestrel) is about 99% effective in preventing pregnancy. This means you have about a 1% chance of getting pregnant. If your urine pregnancy test is negative, then it's likely correct. If you want to be sure you can request a blood test from your doctor. Good luck.