313 J Contemp Med Sci | Vol. 5, No. 6, November–December 2019: 313–316 Original ISSN 2413-0516 Introduction Te pelvimetry refers to the evaluation of the diameters of the bony pelvis to assess the pelvic cavity for the passage of a fetus. 1 Te maternal pelvis morphological feature is important predictive factor of vaginal delivery. Te female pelvis was classifed by Caldwell-Moloy based on shape in 1933. Tis classifcation contain four main pel- vic types; gynaecoid (50%), android (25%), anthropoid (20%), and platy pelloid (0.5%) (Fig. 1). 2 Te prevalence of pelvic varieties is diferent according to sex and races. 3 For successful vaginal delivery proper shape and size of the pelvis is necessary. Te contracted pelvis leads to distur- bances like premature rupture of the membrane, inefective contractions, abnormal conditions of the fetus, labor dystocia, and fnally increasing in rate of cesarean section. 3 Te elective cesarean in these cases could improve the result of delivery. Although cesarean delivery rate is increased in last decades. 5–8 Te result of recent studies showed that rate of cesarean is raised. 9–12 In normal female pelvis, a longer diameter of the inlet (the transverse diameter) and a longer diameter of the midpelvis (the anteroposterior diameter) are placed perpendicularly. Terefore, a fetal head rotates from a transverse position in the pelvic inlet to a sagittal position in the midpelvis. Narrowing of the pelvic cavity in the midpelvis prevent this rotation. Klemt et al. demonstrated that narrow midpelvis and inadequate proportion of the pelvic inlet causes the emergency cesarean section. 13 Te pelvic inlet and midpelvis are important factors to the anthropological analysis of the female pelvic typology. 14 Nowadays evaluation of pelvic types based on clinical examination and imaging techniques including CT, MRI, radiography and US are available. 14,15 Te previous stud- ies have shown that pelvimetry with CT is convenient and accurate technique. 16 Te assessment of pelvic types in addi- tion to another anatomy parameters has clinical importance in predicting the procedures of pregnancy and childbirth in Evaluation of the link between pelvimetry based on computed tomography and predicting status’ delivery Shahla Mirgalobayat, a Laya Ghahari, b Leila Allahqoli, a Seyed Reza Saadat Mostafavi, c Katayoun Safari, d Masih Rikhtehgar, c Ali RamezanGhorbani, c Mohmoodreza Madadian e a Endometriosis Research Center, Rasoul-e-AkramHospital, Iran University of Medical Science (IUMS), Tehran, Iran b Department of Anatomy, School of Medicine, Aja University of Medical Sciences, Tehran, Iran c Department of Radiology, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran d Department of Small Animal Internal Medicine,Islamic Azad University, Tehran, Iran e Faculty of Pharmacy, Islamic Azad University, Tehran, Iran Corresponding author: Shahla Mirgalobayat (Email: mirgaloybayat.sh@iums.ac.ir) (Submitted: 14 August 2019 – Revised version received: 02 September 2019 – Accepted: 12 September 2019 – Published online: 26 December 2019) Objectives The aim of this study is an anthropometric study in non-pregnant reproductive-aged women to predicting kind of delivery. Methods This study was based on the archived information of Hazrat-e Rasool university hospital on 157 generative age women from 16 to 60 years old who underwent CT between March 2015 and March 2018. Results The obtained results showed that the three conjugates on sagittal plane, transverse diameter, anteroposterior sagittal diameter, interspinous diameter, and intertuberous diameter on the coronal plane. The obstetrical conjugate was 123.3 mm in normal vaginal delivery and 113.9 mm in Cesarean section, which was slightly longer than delivery group. The mean interspinous and intertuberous diameters measured by CT scans were 105.0 and 107.4 mm. Conclusion The results of our study showed that because of the reduction in diameter of the inlet and middle pelvis, the rate of cesarean section was higher in females under 35 years ages . Keywords pelvimetry, computed tomography, non-pregnant women Fig. 1 Diferent types of pelvic inlets according to classifcation of Caldwell-Moloy. 4