Pandey M, Singh S, Attri M. Screening and prevalence of vitamin B12 deficiency among pregnant women. Int J Reprod Contracept Obstet Gynecol [Internet]. 2022 Jul. 27 [cited 2025 Dec. 7];11(8):2112-6. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/11883