scholarly journals Determination of Gestational Age: A Perspective With the Bangladeshi Ethnicity

2018 ◽  
Vol 14 (6) ◽  
pp. 375
Author(s):  
M. Lutfor Rahman ◽  
Aysha Sultana ◽  
Kalyan Das
Keyword(s):  
Gestational Age ◽  
Regression Models ◽  
Abdominal Circumference ◽  
Linear Regression Models ◽  
Cross Sectional ◽  
Anatomical Structures ◽  
Femur Length ◽  
Precise Estimation ◽  
Biparietal Diameter

Determination of gestational age (GA) with precision is vital to the proper care of pregnant mothers. Our present study aimed at determining the gestational ages by the ultrasonic measurements of four standard fetal parameters namely biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL) specifically focusing on the Bangladeshi ethnic population. The current study is cross-sectional but data were collected in a prospective nature. There were 229 Bangladeshi women who had usual singleton fetuses with the evidence of menstrual dates by sonography before 14 weeks. Fetal anatomical structures have been scanned and measured at the time of sonographic inspection. Multiple linear regression models of GA by the date of last menstrual period (LMP) and GA by ultrasonographic measures have been fitted on four fetal parameters for our analysis. In the present analysis, we have found that all the response variables i.e. gestational age by LMP and gestational age by ultrasonography (USG) clearly depend on the fetal parameters. The best subsets regression analysis shows that BPD, AC, and FL are the best predictors of GA by LMP (adj R 2 = 96.54). In terms of Mallow’s Cp and adj R 2 , it is found that all the fetal parameters BPD, AC, HC and FL are important predictors for GA by USG. It has been observed that multiple fetal parameters measured by ultrasonography can be useful to predict gestational age during second and third trimesters. Precise estimation of gestational age by this method is helpful to reduce pregnancy-related complicacy and maternal death in the developing countries including Bangladesh.

scholarly journals Placental thickness: an important parameter in determining gestational age and fetal growth during ANC scan

2018 ◽  
Vol 7 (11) ◽  
pp. 4619
Author(s):  
Dipali Kadam ◽  
Saurabh Patil ◽  
Meenal Jain
Keyword(s):  
Gestational Age ◽  
Abdominal Circumference ◽  
P Value ◽  
Third Trimester ◽  
Cross Sectional ◽  
Femur Length ◽  
Biparietal Diameter ◽  
Antenatal Sonography ◽  
Umbilical Cord Insertion ◽  
Placental Thickness

Background: Gestational Age (GA) is one of the most imperative parameters required for proper management in pregnancy. Routinely GA is estimated by sonography utilising Biparietal Diameter (BPD), Femur Length (FL), Abdominal Circumference (AC) and Head Circumference (HC). In any case, these parameters have some limitations. Hence, there is need to find other parameters that may complement the established fetal biometric parameters in predicting GA. The objective of the present study was to assess placental thickness in second and third trimester pregnancies and its relationship with fetal gestational age and its role in detecting LBW and IUGRMethods: A cross sectional prospective study was carried out in three hundred pregnant women between 13 to 40 weeks of gestation, who came for routine antenatal sonography. Placental thickness was measured along with routine parameters. Placental thickness was measured at the level of umbilical cord insertion by two-dimensional ultrasonography.Results: Correlation between the GA by LMP and Placental thickness by ultrasound was done by using Karl Pearson's Correlation(r). The values were expressed as mean + standard deviation. Correlation between placental thickness and gestational age was statistically significant as p value is <0.01. Placental thickness measured in millimetres increases with gestational age in second and third trimester.Conclusions: The correlation between the placental thickness and gestational age was linear and direct. Therefore, Placental thickness is used as a predictor for estimation of gestational age of the fetus in cases where LMP is not known and in detecting developing IUGR and low birth weight.

scholarly journals TO COMPARE ESTIMATION OF GESTATIONAL AGE BY FOETAL TRANSCEREBELLAR DIAMETER WITH BIPARIETAL DIAMETER`, FEMUR LENGTH, ABDOMINAL CIRCUMFERENCE, HEAD CIRCUMFERENCE AT DEPARTMENT OF OBSTETRICS AND GYNAECOLOGY AT SMS MEDICAL COLLEGE, JAIPUR

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Samta Solanki ◽  
Anusha S ◽  
B S Meena
Keyword(s):  
Gestational Age ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Third Trimester ◽  
Cross Sectional ◽  
Femur Length ◽  
Medical College ◽  
Obstetrics And Gynaecology ◽  
Biparietal Diameter ◽  
The Mean

Background: Ultrasonographic assessment of gestational age by using different foetal parameter such as BPD, FL, AC are highly reliable in first and second trimester in pregnancy. In third trimester reliability of any single parameter has limitations. Methods: This was a hospital based comparative cross-sectional study done in the Department of Obstetrics and Gynaecology, S.M.S. Medical College and attached hospitals, Jaipur, Rajasthan. The period of study was from June 2018 to October 2019. Results: The mean TCD at 15 weeks and 40 weeks was 15.00 ± 0.00mm and 53.33±1.155mm respectively. The mean BPD at 16 weeks and 40 weeks was 33.50±0.70mm and 93±1.528mm respectively. The mean HC at 15 weeks and 40 weeks was 111.00±1,41mm and 340±2.00mm respectively. The mean FL at 15 weeks and 40 weeks was 18.50±0.70mm and 77.67±1.528mm respectively. The mean AC at 15 weeks and 40 weeks was 99.00±1.41mm and 365.33±8.32mm respectively. Conclusion:  We conclude that foetal transcerebellar diameter can thus be used as an alternative foetal parameter to assess gestational age and can be used in cases of wrong dates or when other routine parameters are not conclusive or did not accurately predict gestational age for e.g. in cases of hydrocephalus, brachycephaly, dolicocephaly, intrauterine growth restriction, achondroplasia or short limb dwarfism. Keywords: Gestational age, Linear regression, BPD

scholarly journals Transverse cerebellar diameter: a reliable predictor of gestational age

2020 ◽  
Vol 20 (4) ◽  
pp. 1927-32
Author(s):  
Sanjay Mishra ◽  
Surajit Ghatak ◽  
Pratibha Singh ◽  
Dushyant Agrawal ◽  
Pawan Garg
Keyword(s):  
Gestational Age ◽  
Indian Population ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Sectional Study ◽  
Ethnic Population ◽  
Cross Sectional ◽  
Femur Length ◽  
Biparietal Diameter ◽  
Significant Difference

Objectives: To determine accuracy of transverse cerebellar diameter (TCD) measurement in the prediction of gestational age (GA) in normal fetuses; to develop reference chart for TCD according to GA in Indian population. Design: A retrospective cross-sectional study. Method: Ultrasonographic measurements in 300 singleton pregnant women included biparietal diameter (cm), head circum- ference (cm), abdominal circumference (cm), femur length (cm) and transverse cerebellar diameter (cm). Reference chart with mean TCD for corresponding gestational age (GA) in weeks was developed. Results: Statistically significant relationship found between TCD and gestational age (R2=0.92, p=0.0006). Regression for- mulae based on TCD with other parameter can be used to predict gestational age of foetus. When TCD is compared with findings in other studies in different ethnic population, it is found that there is significant difference exists. Conclusion: In normally developing fetuses the TCD has linear correlation with advancing gestational age. A separate refer- ence chart is required for every different population because ethnicity, nutrition and environmental factors can have impact on normal TCD values. This will help to avoid misinterpretation of data to determine gestational age. Keywords: Transverse cerebellar diameter; ultrasonography; gestational age.

scholarly journals Can trans-cerebellar diameter supersede other fetal biometry in measuring gestational age? A prospective study

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Rintu George ◽  
Umamageswari Amirthalingam ◽  
Mohamed Rafi Kathar Hussain ◽  
Vigneshwar Aditiya ◽  
A. M. Anand ◽  
...  
Keyword(s):  
Gestational Age ◽  
Abdominal Circumference ◽  
Radiology Department ◽  
Fetal Head ◽  
Cross Sectional ◽  
Femur Length ◽  
Fetal Biometry ◽  
Biparietal Diameter ◽  
A Prospective Study ◽  
Gestational Age Estimation

Abstract Background Estimation of gestational age plays a pivotal role in day to day clinical practice for appropriate management of newborn. The trans-cerebellar diameter can predict gestational age in cases of variations of fetal head shape such as dolichocephaly and brachycephaly or even when fetus is in posterior position. Trans-cerebellar diameter (TCD) may be useful in gestational age estimation. Aim and methodology To determine the accuracy of trans-cerebellar diameter in the estimation of gestational age of fetus and comparing the conventional parameters like head circumference, biparietal diameter, abdominal circumference and femur length in the measurement of gestational age. This is a prospective, cross-sectional analytical study done in the Radiology Department in those patients who were referred to the department for a routine antenatal ultra-sonogram checkup. Results Comparison of trans-cerebellar diameter with gestational age derived from last menstrual period indicates that there is a linear relationship throughout the gestational ages. There is a strong correlation of trans-cerebellar diameter with other conventional parameters namely biparietal diameter, femur length and abdominal circumference of which Femur length correlates well with the trans-cerebellar diameter. Correlation of transcerebellar diameter with gestational age shows a R2 of 0.995 (p value < 0.001). Conclusion Trans-cerebellar diameter is best in estimation of gestational age when compared to biparietal diameter, femur length and abdominal circumference. The regression formula derived from trans-cerebellar diameter measurement can be applied to determine the gestational age of fetus.

scholarly journals Investigating the Relationship Between Ultrasound Criteria in Determining the Age of Postdate Pregnancy

2021 ◽  
Author(s):  
Nazanin Farshchian ◽  
Ali Naghdian ◽  
Parisa Bahrami Kamangar
Keyword(s):  
Gestational Age ◽  
First Trimester ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Cross Sectional ◽  
Femur Length ◽  
Biparietal Diameter ◽  
The Relationship ◽  
Correlation Rate ◽  
First Trimester Ultrasound

Postdate pregnancy is a pregnancy that pasts more than forty weeks. This can be dangerous for the mother, fetus, and newborn. By knowing the most appropriate ultrasound criteria in predicting the probability of postdate pregnancy, its complications can be reduced by taking timely measures. Therefore, the present study was conducted with the aim of determining the relationship between ultrasound criteria in determining the age of postdate fetuses. This cross-sectional study (descriptive-analytical type) was done in Kermanshah Imam Reza Hospital on 33 pregnant women that, according to LMP and first-trimester ultrasound, pregnancy age was more than 40 weeks. Gestational age was calculated by various ultrasound criteria, including head circumference measurement (HC), Abdominal Circumference (AC), Biparietal Diameter (BPD), femur length (FL), and Transcerebellar Diameter (TCD). The findings were compared with calculated age by LMP. Data were analyzed by SPSS16 software. Correlation rate of pregnancy age based on LMP with FL (R=0.576, P<0.001), AC (R=0.208, P=0.245), BPD (R= -0.200, P=0.264), HC (R= -0.211, P=0.238) and TCD were (R=0.111, P=0.538). The pregnancy age correlation rate based on LMP with ultrasound criteria in general was (R=0.140, P=0.436). There was a direct relationship between gestational age based on LMP with FL, AC, TCD and inversely related to BPD and HC. Among the sonographic criteria, only the FL criterion was significantly correlated with LMP. In general, the correlation between gestational age based on LMP and ultrasound was not statistically significant.

scholarly journals A cross-sectional study to evaluate sonographic foetal humerus length for estimation of gestational age in normal singleton pregnancies at a tertiary care centre

2019 ◽  
Vol 8 (9) ◽  
pp. 3622
Author(s):  
Premlata Mital ◽  
Richa Ainani ◽  
Nupur Hooja ◽  
Priya Sonkhya ◽  
Vishwas Pradodh ◽  
...  
Keyword(s):  
Gestational Age ◽  
Head Circumference ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Additional Parameter ◽  
Sectional Study ◽  
Cross Sectional ◽  
Femur Length ◽  
Biparietal Diameter ◽  
Singleton Pregnancies

Background: Accurate knowledge of gestational age of the foetus is essential for planning a timely and uneventful outcome. Biparietal diameter, head circumference, abdominal circumference and femur length reliably predict gestational age. The humerus length is not widely used as biometric parameter for determining the GA so the present study was done to estimate foetal gestational age by measuring humerus length between 18 to 36 weeks of normal singleton pregnancies and to compare humerus length with routine parameters.Methods: This was a hospital based descriptive cross-sectional study, 200 women with viable singleton pregnancy, with known LMP, between 18 weeks to 36 weeks of gestation were included. Various foetal measurements such as biparietal diameter, head circumference, abdominal circumference, femur length and humerus length were measured using electronic calipers on ultrasound. Data were statistically analyzed.Results: The mean humerus length at 18 weeks was 25.27±1.16 mm and at 36 weeks of gestation was 57.11±1.58 mm. Simple linear regression analysis shows a strongly significant linear relationship between humerus length and gestational age. Where, gestational age (weeks) Y= 0.5213 x humerus length (X) + 4.905; with high degree of correlation coefficient (R2 =0.9785 and P≤0.0001). When Compared with BPD, HC, AC and FL, humerus length also shows a linear correlation.Conclusions: The measurement of the humerus length can be an important additional parameter for estimating gestational age along with other parameters and can be used to predict the gestational age of fetuses in special circumstances.

scholarly journals Sonographic Reference Values for Fetal Transverse Cerebellar Diameter in the Second and Third Trimesters in a Nigerian Population

2017 ◽  
Vol 33 (3) ◽  
pp. 174-181 ◽  
Author(s):  
Charles Ugwoke Eze ◽  
Queendaline Ebere Onwuzu ◽  
Innocent Uchechukwu Nwadike
Keyword(s):  
Reference Values ◽  
Gestational Age ◽  
Head Circumference ◽  
Outer Margin ◽  
Menstrual Period ◽  
Last Menstrual Period ◽  
Abdominal Circumference ◽  
Femur Length ◽  
Biparietal Diameter ◽  
Nigerian Population

This study aimed to establish reference values of fetal transverse cerebellar diameter (TCD) in a Nigerian population. A cross-sectional convenience study was carried out between June 2013 and May 2014 in Enugu, Nigeria. The sonographic examinations were performed on 697 pregnant women with gestational ages between 14 and 40 weeks. The TCD measurements were obtained from the proximal outer margin to the distal outer margin of cerebellum. The women’s last menstrual period, femur length, biparietal diameter, head circumference, and abdominal circumference were also recorded. The mean (standard deviation) TCD increased from 13.6 (2.2) mm to 27.3 (2.6) mm and 28.9 (2.0) mm to 42.9 (2.0) mm in the second and third trimesters, respectively. The relationship of TCD with gestational age obtained from last menstrual period, femur length, biparietal diameter, head circumference, and abdominal circumference was determined. The TCD had a strong correlation with gestational age ( r = .93; P < .05). Reference values for TCD were established for those patients who attended this clinic. This is a likely data set to use for future research that could focus on similar practices and in other regions of the country for possible generation of a nationwide nomogram.

scholarly journals Determination of Gestational Age by Fetal Kidney Length Measurement after the 20th Week in Healthy Women with Uncomplicated Pregnancy in Tertiary Care Centre

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Joshi BR ◽  
◽  
Chaurasia AK ◽  
Khanal UP ◽  
◽  
...  
Keyword(s):  
Gestational Age ◽  
Linear Correlation ◽  
Head Circumference ◽  
Abdominal Circumference ◽  
Fetal Kidney ◽  
Uncomplicated Pregnancy ◽  
Biparietal Diameter ◽  
Study Results ◽  
Kidney Length

Introduction: Various organs are measured to estimate the gestational age of fetus. Sonographically derived parameters used to date pregnancy include Crown rump length, Biparietal diameter, Head circumference, Femoral length and Abdominal circumference. Fetal kidney length, transcerebellar diameter and placental thickness are emerging as new parameters and are claiming to be more accurate in certain situations. In Nepalese context fetal kidney length has not been studied yet so this study was done to fill this need. Methodology: Obstetric sonography was performed in 108 pregnant women with uncomplicated pregnancy to evaluate the efficacy of FKL as a measure to calculate the predicted gestational age. Gestational age ranged from 20 weeks to term. Only patient with known LMP, previous history of normal menstrual cycle and without any exclusion criteria were included in the study. Results: The study showed mean fetal kidney length at 20-24, 25-29, 30- 34 and 35-37 weeks gestation as 22.5±0.5, 26.9±0.7, 32.32±0.7 and 36.3±0.6 respectively. Overall in combined second and third trimester , fetal kidney length showed strong linear correlation with gestation age with highest significant Pearson correlation coefficient of 0.989 as compared to other parameters (BPD=0.986, HC=0.976, AC=0.971, FL=0.984). Conclusion: Fetal kidney showed strongest linear correlation with clinical gestational age and it also demonstrated positive correlation with biparietal diameter, head circumference, abdominal circumference and femur length. Therefore fetal kidney length can be used as a reliable parameter for determination of gestational age.

scholarly journals ULTRASONOGRAPHIC EVALUATION OF FETAL HUMERUS LENGTH FOR ASSESSMENT OF GESTATIONALAGE AND ITS COMPARISON WITH OTHER CONVENTIONAL PARAMETERS

2019 ◽  
pp. 1-3
Author(s):  
Mounika. V.
Keyword(s):  
Growth Parameter ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Third Trimester ◽  
Cross Sectional ◽  
Femur Length ◽  
Coefficient Of Correlation ◽  
Non Invasive ◽  
Biparietal Diameter ◽  
Reliable Parameter

Introduction: Ultrasonography is being a painless, non-invasive, non-ionizing,portable, redoable and relatively inexpensive modality used to evaluate fetal growth parameter many times during pregnancy. Aim: To assess relationship between sonographic gestational age and fetal HUMERUS length between 16 and 39 weeks of gestation and to compare its accuracy with other biometric parameters. Materials and Methods: Prospective cross sectional study was performed on 500 normal singleton pregnancies at second and third trimesters between 16-39 weeks The study was conducted on a gray scale real-time ultrasound scanner using linear and sector transducers to measure the standard fetal biometrics and fetal humeral length. Results: Biparietal diameter (BPD), Head circumference (HC), Abdominal circumference (AC), and Femur length (FL) were compared with standard charts and scatter graphs were plotted. Coefficient of correlation were calculated which were for BPD, HC, AC, and FL, respectively, proving them reliable indicators. HL measured in the present study was compared with standard nomogram. A statistically significant curvilinear correlation was found between the HL and GA indicating it to be a reliable indicator of GA. Significant coefficient of correlation (0.16) was observed between HLand GAindicating it to be a reliable parameter. Conclusion: The HLwas most accurate parameter next to FLin assessing GA. The study also indicates that combination of BPD, HC, AC, FL, HL is more accurate in predicting GA than any single parameter, particularly in the third trimester of pregnancy. HL would contribute to maximum accuracy next to FLamongst all the parameters

scholarly journals Transcerebellar diameter: an effective tool in predicting gestational age in normal and IUGR pregnancy

2018 ◽  
Vol 7 (10) ◽  
pp. 4190
Author(s):  
Sunita Dashottar ◽  
Krishna Pratap Singh Senger ◽  
Yashashvi Shukla ◽  
Ankita Singh ◽  
Surabhi Sharma
Keyword(s):  
Gestational Age ◽  
Tertiary Care ◽  
Surrogate Marker ◽  
Normal Pregnancy ◽  
Abdominal Circumference ◽  
Femur Length ◽  
Growth Status ◽  
Biparietal Diameter ◽  
Number Of Patients ◽  
Common Term

Background: Gestational age is the common term used during pregnancy to describe how far advanced is the pregnancy. In the second and third trimesters, estimation of gestational age is accomplished by measuring the biparietal diameter, head circumference, abdominal circumference, and femur length. The transverse cerebellar diameter (TCD) may serve as a reliable predictor of gestational age (GA) of the fetus and a standard against which aberrations in other fetal parameters can be compared.Methods: The study was conducted in the tertiary care teaching hospital from July 2016 to March 2017. 200 pregnant women of gestational age 15-40 weeks of pregnancy referred from Dept of Obs and Gynae for antenatal scan comprised our study sample.Results: Age of women ranged from 18 to 43 years with maximum number of patients aged 26-30 years. Maximum cases with clinical suspicion for IUGR were in gestational age >36-40 weeks (50%). Evaluation of difference in actual and estimated gestational age between normal and actual gestational age showed that for normal pregnancy as well as in IUGR pregnancies mean difference between estimated and actual gestational age was minimum in TCD followed by other established parameters.Conclusions: TCD being a stable parameter irrespective of growth status of fetus, provides a basis for its usefulness as a ratio to predict IUGR and other perainatal outcomes as used in several studies. Thus, despite not being a direct marker for IUGR it can serve as a surrogate marker for detection of IUGR and another adverse perinatal outcome.

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