Good (short!)reading about Doulas and their benefits
Cesarean birth rates at Bay Area hospitals
If you're planning to birth at a hospital, you can search here for your hospital's cesarean birth rate
http://spreadsheets.latimes.com/c-section-rates/
DOULA definition and etymology
https://en.wikipedia.org/wiki/Doula
DONA (Doulas of North America)
https://www.dona.org/what-is-a-doula/
WHO (World Health Organization)
http://internationaldoulainstitute.com/2016/03/world-health-organization-who-recommends-doulas/
American Pregnancy Association
http://americanpregnancy.org/labor-and-birth/having-a-doula/
Birth books that are actually good
Ina May Gaskin's Guide to Childbirth
http://www.barnesandnoble.com/w/ina-mays-guide-to-childbirth-ina-may-gaskin/1100619144
Active Birth
http://www.barnesandnoble.com/w/active-birth-revised-edition-janet-balaskas/1111454795
Childbirth Without Fear
http://www.barnesandnoble.com/w/childbirth-without-fear-grantly-dick-read/1111033158
The Birth Partner
http://www.barnesandnoble.com/w/the-birth-partner-revised-4th-edition-penny-simkin/1114478141