Bhattacharya, SwagataMaity, DebabrataSadhu, AnirbanKhanra, Senjuti2019-12-062019-12-062018-11Bhattacharya Swagata, Maity Debabrata, Sadhu Anirban, Khanra Senjuti. Morphometric Study of Knee Cap (Patella). Annals of International medical and Dental Research. 2018 Nov; 4(11): 5-92395-28222395-2814http://imsear.searo.who.int/handle/123456789/188453Background: The Sonographic cross sectional study was to determine the curve for umbilical cord diameter with respect to fetal age in primi and multi gravida separately. Methods: 100 uneventful pregnancies of second and third trimester were studied. SPSS, v17, IBM, Chicago, were used for statistical analysis and polynomial regression equations were calculated. Results: The regression equation of umbilical cord diameter to Gestational Age : y=-0.018x2+1.290x-9.418(R2=0.585) in primigravida . For multigravida cord diameter to Gestational Age : -6.020 + 0.990 x – 0.012 x2 (R2 0.613) , where x is fetal age in weeks , y is cord diameter in milimetres. Conclusion: The diameter increased significantly with fetal age upto 32 weeks, thereafter a plateau was seenJournal ArticleIndiaSenior Resident (Anatomy), I.P.G.M.E.R., Kolkata, West Bengal, India.Post Doctorate Trainee in Plastic and Reconstructive Surgery, R.G.Kar Medical College and Hospital, West Bengal, India.Associate Professor, Department of Anatomy, R.G.Kar Medical College and Hospital, West Bengal, Assistant Professor, Institute of Engineering and Management, Kolkata, West Bengal, India