Study on the correlation between the femur length and gestational age from 14-30 weeks. Determination of numeric value table of femur length in correlation with centesimal line 5, 10, 50, 90 and 95 to make a basis to built fetus’s femur length chart, applying to monitor normal or malformation status of fetus. The results: fetus’femur length have a closely correlation with gestational age belong to a second-class function: y = 0.0019x2 +0.2377x + 11.1892, r = 0.97, in which, x = gestational age, y = femur length. Based on this chart, the accuracy of the dating random error about 1 week. The earlier, the estimation of gestational age, the more accurate
Gestational Age ; Femur ; Ultrasonography

No abstract available.
Femur* ; Gestational Age* ; Ultrasonography*

Background: In the first 3 months of pregnancy, gestational age to calculate one can measure fetal size bag, the butt length of the embryo pregnancy by ultrasound. After 3 months, estimated gestational age based on peak diameter, femur length, diameter of the cerebellum, the average diameter of two eye holes.\r\n', u'Objectives: Measure and analyze the structure of the fovea, the average diameter of the fovea, as measured two other indicators of the fetus on ultrasound. Learn more connections with the diameter of the fetal development, with gestational age, peak diameter.\r\n', u'Subjects and method: Measuring the interorbital distance of the fetus for pregnant women with regular MP from 28-30 days by ultrasound and with gestational age from 14 weeks of gestation on. Using 2D ultrasound, measuring the indicators of the fetus as the distance between the fovea, peak diameter, transparent front wall, two-hump peak.\r\n', u'Results:The results showed that: there\u2019s a relation between the diameter of the orbital distance with its gestational age. It is demonatrated as followed: Y=0.7873x + 4.0273 with R = 0.8412. The distance between the fovea and peak diameter correlated by the equation Y = 2.1719x + 4.4799 v\u1edbi R = 0.7517. It is more easy and accurate to measure the interorbital distance for pregnancy in second trimester. \r\n', u'Conclusion: Basing on this result, whenever the pregnant woman could not remember exactly the first day of her last MP or her MP is long, we can use the graph of this relation to estimate the weight of the fetal and the day of delivery.\r\n', u'
Gestational Age/ ultrasonography

In this study, 123 normal pregnancies were performed 649 times of ultrasonographic examinations. Results: there is a correlation between the ratio of head/abdomen circumference and fetal age as following: primipare Y = 1.842633 - 0.029259X + 0.0000047X3, r = 0,777; multipare Y = 1.672611 - 0.022408X + 0.00000278X3, r = 0,795; (Y = Head/ abdomen circumference; X = gestational age). Determination of ratio of head/abdomen circumference will help making early diagnosis abnormal fetal development, so it's necessary to apply this ratio in clinical care
Gestational Age ; ultrasonography ; Pregnancy

he relationship between growth of fetal abdominal circumference and fetal age was examined between 28-41 weeks' gestation in 123 normal singleton pregnancies by ultrasonography. The findings have shown that there is a high correlation between abdominal circumference and fetal age as follows: primipare Y = -183,008 + 16,392X - 0,002X3 (r = 0,928); multipare Y = = -164,330 + 15,712X - 0,002X3 (r = 0,935). Fetal abdominal circumference is different between studies and ethnic groups, especially in near full term fetal. It's important to separate fetal abdominal circumference in first-born fetal and second-born fetal. The ultrasonic measurement of the fetal abdominal circumference is a sensitive and precise variable for estimation of fetal growth and development
Gestational Age ; ultrasonography ; pregnancy ;

The relationship between the growth of fetal abdominal circumference and the fetal age was determined by ultrasonography during the 28-41 weeks of gestation in 123 normal pregnancy. A closed correlation was identified and an equation was established
Gestational Age ; Abdomen ; Ultrasonography

OBJECTIVE: To investigate whether there is a difference in cerebellar development between appropriate -for-gestational-age (AGA) infants and small-for-gestational-age (SGA) infants. METHODS: A total of 165 AGA infants and 105 SGA infants, with a gestational age of 26-40 weeks, were enrolled in this study. Within 24-48 hours after birth, ultrasound examination was performed to measure the transverse diameter of the cerebellum, the height of the vermis, the area of the vermis, the perimeter of the vermis, and the area and perimeter of the cerebellum on transverse section. A Pearson correlation analysis was used to investigate the correlation between cerebellar measurements and gestational age. RESULTS: In both AGA and SGA infants, all cerebellar measurements were positively correlated with gestational age (r=0.50-0.81, P<0.05). In AGA and SGA infants, there were no significant differences in the measurements between the 25-27 weeks, 28-30 weeks, and 31-33 weeks of gestational age subgroups (P>0.05), while in the 34-36 weeks and 37-40 weeks subgroups, the SGA infants had significantly lower measurements than the AGA infants (P<0.05). CONCLUSIONS The SGA infants with a gestational age of <34 weeks have intrauterine cerebellar development similar to AGA infants, but those with a gestational age of ≥34 weeks have poorer intrauterine cerebellar development than AGA infants.
Cerebellum ; Gestational Age ; Humans ; Infant ; Infant, Small for Gestational Age ; Ultrasonography

No abstract available.
Female ; Femur* ; Gestational Age* ; Humans ; Pregnancy* ; Ultrasonography*

Recently, the increasing use of antenatal high resolutional ultrasonographic studies, and the increasing expertise of sonographers have contributed to the more frequent prenatal detecton of fetal hepatic calcification. Fetal hepatic calcification can arise from peritoneal, ischemic, infectious, neoplastic, and idiopathic causes. There are many reports that the prognosis is good in isolated fetal hepatic calcification without chromosomal aberrations, associated congenital malfomations or other organ abnormalities. We report one case of fetal hepatic calcification diagnosed by prenatal ultrasonography at gestational age of 27 weeks, without chromosomal abnormalities or other associated organ abnormalities, showing good prognosis.
Chromosome Aberrations ; Fetus ; Gestational Age ; Prognosis* ; Ultrasonography, Prenatal

OBJECTIVE: The aim of this study was to propose simple mathematical formulae to estimate median values of fetal biometry including biparietal diameter (BPD), abdominal circumference (AC) and femur length (FL) at each gestational age (GA) easily without looking up the previously established reference values. METHODS: Simple mathematical formulae to estimate median values of fetal biometric values at each gestational week were inferred. To validate these formulae, three different linear equations were derived from previously reported reference values of median BPD, AC and FL using regression analysis at each gestational week. Finally, calculated data through the inferred formula were compared to retrospectively collected data (observed data). RESULTS: The equation revealing the relationship between BPD and GA was: median BPD (cm)=GA (wk)/4. Using this simple mathematical formula, the absolute percentage error between observed data and calculated data ranged from 0.12% to 7.50%. The equation between AC and GA was: median AC (cm)=GA (wk)-5. Through this formula, the absolute percentage error was analyzed same as above and it ranged from 0.30% to 4.76%. Lastly the derived formula between FL and GA was: median FL (cm)=GA (wk)/5 and the absolute percentage error ranged from 4.52% to 16.75%. CONCLUSION: The three simple formulae suggested in our study showed a significantly easy way to estimate the median values of fetal biometry at each gestational week with good reliability.
Biometry* ; Femur ; Gestational Age* ; Reference Values ; Retrospective Studies ; Ultrasonography