hmm not real sure on that one.. I would think that you might be okay now, as long as she isn't the one smoking, she has to carry the baby and anything she consumes her baby does also. good luck
there have been studies that show males who smoke marijuana on a regular basis produce deformed sperm, poor swimmers and sperm that strong. if you were smoking still and she got pregnant there are a few risks to the baby, but since you've stopped and i assume are not going to start again, after a month the system clears residual marijuana chemicals. you should both be fine.
good job on stopping the use. :)
if you need more info go into the maternal and childhealth forum and search marijuana use during pregnancy. there is a rather long topic with alot of information there.
best wishes in conceiving and having a healthy child !