1. Morphology of the cervical vertebrae in the fetal-neonatal human skeleton;Castellena;J Anat,1999
2. 2. Arshad M, Ghaus F, Nasir N, et al. Determination of Gestational Age by Measurements of Hand-A Morphometric Study in Human Foetuses. Shrinkala 2014 May;1(9):1-4.
3. 3. Mittal M, Gupta P, Nanda V. Fetal Gestational Age Estimation by Fetal Foot Length Measurement and Fetal Femur to Foot Length Ratio in Indian Popuation-A Prospective Study. JEMDS 2014 March;3(10):2620-25.
4. 4. Streeter GL. Weight, Sitting Height, Head Size, Foot Length and Menstrual Age of the Human Embryo. Contrib embryo Carnegie Inst 1920;11:147-70.
5. 5. Kumar GP, Kumar UK. Estimation of gestational age from hand and foot length. Med Sci Law 1993;33:48-50.