In Greek, "doula" is translated "a woman who serves"

A doula is a trained professional who provides physical, emotional and educational support throughout pregnancy, birth and postpartum. It is not a medical role, and does not replace that of a midwife or an OB.

A doula is committed to supporting women throughout pregnancy, the entirety of labor, and during the initial postpartum period. They are there for emotional and educational support each step of the way. Their entire priority is that you would be supported throughout the entire process- and most specifically during birth. This can take on many forms- including ideas for comfort measures, position changes, and emotional encouragement.
Not at all. Your partner brings history and connection to your relationship that cannot be replicated. The unique ways they know you and understand how to emotionally support you is necessary. A doula brings knowledge and experience- as well as emotional support- but works in conjunction with your partner, not against them.
No! A doula supports women through whatever preferences they have and whatever decisions they choose to make. Pregnancy, birth, and postpartum are all full of new experiences, uncertainties, and questions and your doula is committed to help you understand and educate you on your options and support you in the process.