Need some advice

So me and my SO been together for 5 years now and we've been ttc now. But he smokes marijuana he's been smoking way before I met him since he was 13 some people say that has nothing to do with me getting pregnant but I think other wise . does him smoking weed have an affect with me getting pregnant.lol my dad smoked and my mom said it didn't affect her getting pregnant with me and my brother 😂😂 some advice please thanks and if your going to give me advice don't be rude!! 😆