I've been doing acupuncture for 1.5 years and I do believe it is helpful for fertility issues. I KNOW it is helpful for blood flow issues to the ovaries and uterus as CC.RM strongly suggests it (I am a new patient there) and also offers it before and after transfers.
I've had 2 pregnancies in that time, neither of which lasted. I wouldn't say that acu was the sole reason that I got PG because I also had 2 PGs before acu. I also would not say that acu had any correlation to my miscarriage or chem PG.
Acu for me is very very relaxing and prior to doing IVFs, helped to regulate my cycles (eliminating spotting and increasing their length from 26 days to 28.)
I'm quite needle adverse but I enjoy acupuncture and if you pursue it, would suggest you find a practitioner who specializes in fertility issues.