Estimation of Fetal Gestational Age in Second &amp; Third Trimesters from Ultrasonographic Measurements of Different Fetal Biometric Parameters

Kumar, Kuldeep; Beg, Mirza R.U.; Babu, C.S. Ramesh; Shrivastava, R. K.

doi:10.5958/2394-2126.2015.00001.8

Cited by 6 publications

(5 citation statements)

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“…Thus there was significant correlation between GA by LMP and BDP. Similar findigs were also reported by Sherif A. Akl, et al13 ,kansaria and parulekar14 and konje et al15 Patre, et al16 and Kumar et al21 . The relationship between the BPD and…”

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confidence: 84%

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Background: Rapid and accurate determination of gestational age (GA) may be vital to the appropriate care of the pregnant patient and improve obstetric care through allowing the optimal timing of necessary interventions and the avoidance of unnecessary ones. Ultrasound scans are considered to be the most cost-effective, accurate and safe method for measurement of various fetal parts in pregnant women. Objectives: To study the prediction of Gestational Age by Ultrasonic Measurement of the Biparietal Diameter in Third Trimester. Materials and Method: In the present study total 100 pregnant female attending antenatal clinic of the study institute in third trimester were enrolled. Detailed demographic profile including age, address etc was obtained. Detailed history regarding the exact knowledge of her LMP, cycle regularity and duration of cycle was taken. All patients then underwent detailed examination i.e. general and systematic examination. The gestational age at time of scanning was confirmed by LMP, and abdominal examination. All the women in the study underwent ultrasonoghraphy. The ultrasound was done by a single operator to avoid bias in observations. All the fetal parameters were assessed and special attention was given to the Biparital diameter. The collected data was entered in Microsoft excel. Primary analysis was conducted by using Epi Info statistical software. Results: Majority of the patients (38%) belonged to age group 20-25 years followed by 36 patients in 25-30 years. Gestational age was calculated according to the LMP and it was observed that majority of the patients were of 35 weeks gestation (14%) followed by 30 weeks (12%) and minimum were of 40 weeks gestation. The mean gestational age was 33.53±3.368 weeks. The gestational age was calculated by using BPD on ultrasonoghraphy and it was seen that majority of the women were of 38 weeks of gestational age (16%) followed by 33 weeks of gestation (13%) with mean gestational age of35.87±2.96 weeks.Similarity of GA in LMP with BDP was observed in 13 patients. The Correlation coefficient between GA by LMP and GA by BDP was 0.9268 with P-Value <0.05. Thus there was significant correlation between GA by LMP and BDP. Conclusion: The gestational age estimated from Biparital diameter was correlated with the gestational age calculated from the LMP with Correlation coefficient of 0.9268 with P-Value <0.05.Thus we conclude that the Biparital diameter can be useful in evaluation of Assessment of Gestational Age in Third Trimester and the findings

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“…The conventional fetal growth parameters for this purpose have primarily included Biparietal Diameter (BPD), Femur length (FL), Head circumference (HC), and Abdominal circumference (AC). The most common parameters used for fetal growth evaluation include BPD and FL [3] while some of the other additional parameters used on a case to case basis by some of the researchers include the transcerebellar diameter (TCD) [4], Fetal renal length and/or volume [5][6][7], humeral length, scapular length [8], and multiple fetal parameters [9] besides others.…”

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confidence: 99%

Evaluation of Fetal Thigh Circumference as an Additional Marker for Foetal Biometry

Gupta

Bhardwaj

Kaur

et al. 2021

Asian J Pharm Clin Res

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Objective: Accurate determination of gestational age is the sine qua non of optimal management and hence prognostication of all pregnancies.A meticulous biometry ensures timely interventions resulting in favorable maternal and fetal outcomes. Traditionally, the parameters of Biparietal diameter (BPD), Femur length (FL), Head circumference (HC), and Abdominal circumference (AC) have been utilized for routine fetal biometry. The present study aims to assess the utility of Fetal Thigh Circumference (ThC) as an additional marker for fetal biometry. Methods: The present retrospective, observational, and cross-sectional study was done in the Departments of Radiodiagnosis and Obstetrics and Gynaecology in an ethically and socio-economically diverse group of pregnant females. All pregnant females with singleton pregnancies between 22 and 40 weeks of gestation and fulfilling the inclusion and exclusion criteria were subjected to ultrasound examination. Subsequently analysis was done for the data collected. Results: There were a total of 287 participants in present study group with mean age of 23±3.4 years. The strength of agreement almost perfect (>0.99) between the mean observed ThC to ThC values by Deter et al. taken as standard. There was a highly significant positive correlation between gestational period and standard biometry parameters and ThC. ThC model for prediction will be better than standard biometry parameters of BPD, HC and AC but not as good as FL model according to the regression analysis of the present study. Conclusions: There is concordance of fetal ThC as an accurate predictor of period of gestation only after FL. It can be combined with standard biometry parameters to give a better estimation of period of gestation.

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“…Most parameters are reliable or limited only at specific periods of gestation. For example, CRL and BPD are most reliable in the first trimester and second trimester respectively [7][8][9][10]. In an effort to increase the reliability and choice of biometric parameters at different stages during gestation, NC as an additional ultrasound parameter was introduced to complement the existing parameters nonetheless.…”

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confidence: 99%

Sonographic Assessment of Fetal Neck Circumference (NC) As a Predictor of Gestational Age

Abdulkadir

Nwobi

Abubakar

et al. 2020

Journal of Fetal Medicine

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Background The need for development of population based nomograms for ultrasound fetal dating cannot be overemphasised. The objective of this study was to develop a nomogram of Fetal Neck Circumference (NC) for predicting gestational age for this population. Methods This was a cross sectional prospective study of 203 singleton normal pregnant women of 15-40 weeks' gestation. Fetal NC was measured the 5th, 50th and 95th centile values were estimated at each week of gestational age, 50th centile values were then compared to Caucasian and African population study to assess variability. Results A nomogram was derived and NC values showed no statistical significant difference compared to the Caucasians (p = 0.065, 0.257) and African (p = 0.947) population. There was a strong positive significant correlation (r 2 = 0.799; p = 0.001) between NC and average gestational age. Method of least square yielded to the equation y = 2.22x ? 5.390. NC relationship with BPD (r 2 = 0.859; p = 0.001), FL (r 2 = 0.842; p = 0.001) and HC (r 2 = 0.662; p = 0.001) were also significant and positive. Estimated weekly increase in NC was 0.72 cm. Conclusion This study derived nomogram for ultrasound measurement of fetal NC in a Northern Nigerian population. However, NC values from this study differ less with an African population than with Caucasian study population.

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Estimation of Fetal Gestational Age in Second & Third Trimesters from Ultrasonographic Measurements of Different Fetal Biometric Parameters

Cited by 6 publications

References 4 publications

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Evaluation of Fetal Thigh Circumference as an Additional Marker for Foetal Biometry

Sonographic Assessment of Fetal Neck Circumference (NC) As a Predictor of Gestational Age

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