Begum, Arzu Manth Ara, et al. “Comparative Study of Outcome of Postdated Pregnancy of Primaegravida and Multigravida Patients”. Journal of Dhaka National Medical College & Hospital, vol. 20, no. 2, Sept. 2014, pp. 16-20, doi:10.3329/jdnmch.v20i2.77799.