Oh I wanted to add this, to at least answer your question:

What is the test for? You are in a delicate situation, so the usual detox methods we say on this site might not work (water dillution, xtra vitamins, niacin, etc), most of all might harm the development baby. All I can say is use the substition method (using a sample from a friend or ordering synthenic urine). Make sure the urine is of right temperture (94F-100F) and your good.