It can take as little as one month or it can take up to 3 years to get out of your system. Every body is different. Good luck.
I had kidney problems as a child and was told that if I ever conceived I would most likely miscarry. Thyroid problems as a teenager I was told I would have a hard time conceiving. Went on Depo at 18 at the request of my BF. Was supposed to get a shot End of Jan 2005. Missed the shot, wasn't worried about it because of the year turn around time I read about. Found out I was pregnant Feb of 2005, and delivered Nov 2005. Nothing is impossible.