Should I stop.. does it even matter

Hello. I've been TTC. I don't have kids of my own. I've had a miscarriage and a blighted ovum in the past. I smoke marijuana regularly. More like on a daily basis now.  What are people's thoughts on smoking while TTC? If, God willing I do become pregnant, I have every intention of stopping. But I hear it doesn't have an affect then others say it does. Thoughts??