ADA:

Guidelines for treating pregnant patients

Concerning safety of dental treatments:

ADA Press Release

Dental Care for Pregnant Women

http://jada.ada.org/article/S0002-8177(14)60323-8/abstract

Da Costa, Elizabeth Prada et al.
The Journal of the American Dental Association , Volume 141 , Issue 8 , 986 – 994

 

Oral health literacy and knowledge among patients who are pregnant for the first time

http://jada.ada.org/article/S0002-8177(14)61830-4/abstract

Hom, Jacqueline M. et al.
The Journal of the American Dental Association , Volume 143 , Issue 9 , 972 – 980

 

Examining the Safety of Dental Treatment in Pregnant Women

http://jada.ada.org/article/S0002-8177(14)64054-X/abstract

Michalowicz, Bryan S. et al.
The Journal of the American Dental Association , Volume 139 , Issue 6 , 685 – 695