Srivastava, G., Mumal Nagwani, Tewari, V. ., Khanduri, S. ., Kunwar, S., & Prince Kapoor. (2022). An ultrasonographic study to evaluate the correlation of calcified yolk sac with spontaneous abortion. Asian Journal of Medical Sciences, 13(4), 182–186. https://doi.org/10.3126/ajms.v13i4.41499