Ahmed, S. I. ., N. M. Saber, S. F. Shalaby, and S. E. S. M. Dawoud. “The Effect of Instructional Guidelines Intervention on Pregnant women’s Knowledge, Clinical Outcomes, and Self-Efficacy Regarding Prevention of Osteoporosis”. International Journal of Health Sciences, vol. 5, no. S2, Dec. 2021, pp. 965-81, doi:10.53730/ijhs.v5nS2.13979.