I don't think it does work, but then again it's really hard to study acupuncture because you can't have a control group, not like you can pretend to put a needle in someone!
I did acupuncture for all 4 of my cycles. The cycle I went twice a week, I was successful. I can’t be sure that it’s a major factor but it definitely helps with reducing stress, which helps with the whole process. Good luck!
I did try it for about a year and did nothing but everyone is different tho