Gardosi J (2011) Clinical strategies for improving the detection of fetal growth restriction. Hoffman C, Messer LC, Mendola P, Savitz DA, Herring AH, Hartmann KE (2008) Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Int J Gynaecol Obstet 87:38–39Ĭhambliss LR, Clark SL (2014) Paper gestational age wheels are generally inaccurate. Am J Obstet Gynecol 187(6):1660–1666īarr WB, Pecci CC (2004) Last menstrual period versus ultrasound for pregnancy dating. Savitz DA, Terry JW Jr, Dole N, Thorp JM Jr, Siega-Riz AM, Herring AH (2002) Comparison of pregnancy by last menstrual period, ultrasound scanning, and their combination. Wegienka G, Baird DD (2005) A comparison of recalled date of last menstrual period with prospectively recorded dates. ĭavies MW, Swaminathan M, Betheras FR (2001) Measurement of transverse cerebellar diameter in preterm neonates and its use in assessment of gestational age. Hussein J, Hirose A, Owolabi O, Imamura M, Kanguru L, Okonofua F (2016) Maternal death and obstetric audits in Nigeria: a systematic review of barriers and enabling factors in the provision of emergency care. Subject to further validation, the nomograms derived using TCD proposed in the present study could be used as reliable GA estimators in the late stages of pregnancy among women who are unsure of the date of onset of their LMP. In a population of healthy pregnant women of Igbo ethnic origin living in Oshodi, Lagos State, Nigeria, the sonographically measured TCD was more accurate as a single estimator of GA than BPD, HC, AC, and FL in the late stages of pregnancy. The GA that was estimated using regression models, which were derived using the sonographically measured TCD, was closer to the actual GA in the second and third trimesters of pregnancy than the GA estimated using other fetal parameters. The mean TCD was 32.0 ± 11.6 mm TCD had a strong positive linear relationship with GA ( R = 0.988 R 2 = 0. TCD was measured and employed to derive regression models utilized to assess GA. GA was calculated from the date of onset of the last menstrual period (LMP) and was used as the standard criterion, while the biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL) were used to estimate GA. MethodsĪ convenience sample of 257 healthy pregnant women of Igbo ethnic origin with singleton normal pregnancy whose GA ranged from 16 to 40 weeks were examined. To use a sonographic method to determine the usefulness of trans-cerebellar diameter (TCD) as an independent estimator of gestational age (GA).