Here are some useful articles for you and your partner to read, so you can decide if a doula is right for you and your family.
http://www.bellybelly.com.au/pregnancy/doulas-what-is-a-doula/
http://www.bellybelly.com.au/birth/7-ways-doulas-benefit-dads-and-partners/
http://americanpregnancy.org/labor-and-birth/having-a-doula/
http://www.mothering.com/articles/planning-for-postpartum-help-is-not-a-luxury/