Here is a great academic article from the US National Library of Medicine National Institutes of Health on the subject of chiropractic care and pregnancy. it has bene fully peer reviewed and there are further links to citations within the article, if you are looking for a study on how chiropractic care may help when you are pregnant.

Read the article here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2647084/