Hello Thanks for your query. If the urination is foul smelling, it sounds like a urinary tract infection. Also, the fact that she urinates only twice a day is not normal. SHe needs to increase her fluid intake and consult a gynecologist to rule out urinary infecion. ALso, on implanon, it is very common to have mild spotting off and on. It is a common side effect. The implanon would definitely protect you against pregnancy, however no method is foolproof as you know. SO, while she consults the doctor for the urinary problem, she should also ensure that there is no incidental pregnancy. take care.