It is common, especially in engineering applications, to represent the specific gas constant by the symbol R. In such cases, the universal gas constant is usually given a different symbol such as R to distinguish it.
If it is hormone incorporated iud like Mirena (levonorgestrel) you bleed few days from removal of iud (3-5) days but then you have hormone withdrwal bleeding for few days after iud removal which may last fdor 3-5 days. ...Read more. See 1 more doctor answer.
I am surprised that you have an IUD like that. It is usually only given to women who have had children. Anyway it should go away within 3 months. If not you need to go to your doctor for an ultrasound. The proper positioning of any IUD is most important and the bleeding can indicate the possibility that it is being expelled but I would wait. A week and 3 days is nothing. Relax