Deca Question

Maybe somebody can give me some good answers about Deca. I am currently useing Androgel for Test Deficency. I go to the doctor every 3 months and get blood drawn to see if is coming up or not.

About a week after blood test I go back in to the Dr. to get results. They have me give a urine sample. Here is my question. Are they looking for other things? And will they be able to see the Deca?

Thanks for any help.