Below are some links for good resources. 

 

https://evidencebasedbirth.com/the-evidence-for-doulas/

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10292163/

https://www.whattoexpect.com/pregnancy/hiring-doula

 

https://www.marchofdimes.org/find-support/blog/doulas-can-improve-care-during-and-after-childbirth

 

https://americanpregnancy.org/healthy-pregnancy/labor-and-birth/having-a-doula/