Kayastha, B., and A. Shrestha. “Maternal and Perinatal Outcome of Threatened Abortion With Subchorionic Hemorrhage in First and Second Trimester”. Journal of College of Medical Sciences-Nepal, vol. 17, no. 4, Dec. 2021, pp. 316-21, doi:10.3126/jcmsn.v17i4.42231.