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

No abstract available.
Cytogenetics* ; Gestational Age*

No abstract available.
Fetal Development* ; Gestational Age*

No abstract available.
Fetal Development* ; Gestational Age*

No abstract available.
Extremities* ; Gestational Age*

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 ;

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

Study the correlation of fetal crown-rump lengtht (CRL) measurement and gestational age of 6 to 14 weeks in 100 pregnant women. Results: there is a close correlation between CRL measurement measured by ultrasound and gestational age, with correlation function y = 0.86x2 - 7.53x - 18.78; correlation coefficient r = 0.998. Thus ultrasound can be used to measure CRL for diagnosis of gestational age, with the range was within 3.7 days of menstrual age. The rate of change in CRL was 7 mm/week between 7-10 weeks and 13.5 mm/week between 11-14 weeks
Gestational Age ; Fetus ; Ultrasonics