What are the benefits of accupunture when trying to conceive? have pcos

Likely none: Accupuncture has not been established as a proven treatment for anything, but some folks do feel relief with treatment. Could be a placebo effect, but that doesn't matter. As long as the needles are sterile, it's unlikely to do you much harm--although it does make your wallet lighter.

Female infertility: The world health organization places female infertility under the category of "diseases, symptoms or conditions for which the therapeutic effect of acupuncture has been shown but for which further proof is needed." although it can be very helpful for conception, i don't know data on pcos.