Will smoking marijuana increase a women's chance of fertility if she has pcos?

Nope. Nice try, though.... Any smoking will not increase your fertility or improve pcos symptoms. You may not care as much ; have an increased appetite, neither which is beneficial to achieve pregnancy. Talk to your doc about using metformin to improve any glucose intolerance, improve ovulation, and if all fails, ovulation induction with Clomid (clomiphene) is helpful further down the road. Good luck!
NO. Although marijuana is noted for many positive health effects. It has not been shown to lower testosterone levels, which is the primary issue in pcos. Use of agents such as metformin or spironolactone are shown to be more effective in pcos.