Mahato, Vibha, Pravin Shrestha, and Pradeep Bhattarai. “Advanced Maternal Age and Pregnancy Outcome at Manipal Teaching Hospital: Cross-Sectional Analytical Study”. Nepal Journal of Medical Sciences 6, no. 1 (April 28, 2021): 20–25. Accessed November 27, 2021. https://nepjol.info/index.php/NJMS/article/view/36728.