Here's a great article on using acupuncture during pregnancy--and pretty accurate too, except for the assertion that there's a long history of using acupuncture/pressure during labor. Actually this is a relatively recent development.

If you're wanting to learn more about Chinese medicine, here's a good basic overview (please note, the page will download automatically when you click on the link below):

chinese-medicine-works.com/pdfs/foundation_concepts.pdf

As reported in The New York Times, "for chronic headaches the best treatment may be one of the oldest: acupuncture."

See http://www.nytimes.com/2008/12/16/health/research/16regi.html?_r=1&ref=science to read the full story.