Like Muppity, I love my acupuncturist! She has helped me remain calm and positive whilst TTC naturally and then through my IVF journey which resulted in a BFP.
From my conversations with her, it seems that acupuncture can increase the blood flow to the uterus which I believe aids implantation. They are also able to work a lot with the kidneys which are really important when TTC.

Following is a link fromn the ABC show Catalyst which documents how acupuncture can help. You can watch the program - it goes for about 10 mins - and judge for yourself.

Catalyst: Improving The Odds Of IVF - ABC TV Science

IMO, acupuncture played a crucial role in my achieving a BFP.

Hope this helps.

xxTaurean78