What is the realistic chance of female fertility if she smokes about a pack of ciggarettes a day and smoke 2 blunts everyday?

Decreased: According to studies, time to achieve pregnancy is increased with any amount of smoking, & past 10 cigarettes a day it becomes statistically significant. It doesn't matter which type of cigarette is smoked, all make it harded to get pregnant, more likely to have a miscarriage, more likely to deliver prematurely, & more likely for the baby to have problems.

Reduced: There are few studies on marijuana and fertility (its hard to design studies on illegal drugs, ) but what i've seen consistently suggests problems in male and female fertility. Like tobacco it depends on how much you use. Cigarettes reduce natural fertility by about 15% per-cycle . Marijuana has more combustion products than tobacco, so it's reasonable it's at least as harmful.