1. How Safe Is Exercise during Pregnancy?
Eileen Greif Fishbein, RN, DNSc 
Journal of Obstetric, Gynecologic & Neonatal Nursing 
Volume 19, Issue 1, Pages (January 1990)
DOI: /j tb02524.x
Copyright © 1990 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

2. Figure 1 ACOG Exercise Guidelines
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 45-49DOI: ( /j tb02524.x)
Copyright © 1990 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions