الفهرس 
Fetal growthOnly 14 pages are availabe for public view
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Abstract
SUMMARY
etal weight is an important parameter affecting fetal and
neonatal morbidity and mortality; in addition fetal weight
estimation can be an essential parameter for obstetric
management in suspected cases.
Increasing fetal weight is accompanied by increasing
placental size, so one can reasonably hypothesize that there is a
relationship between umbilical artery FVW impedance and fetal
weight independent of gestational age.
Accurate determination of fetal weight prior to delivery
can have a significant effect on the management decision in
labor, thereby markedly improving perinatal outcome, hence the
importance to determine the accuracy of prediction of birth
weight by fetal ultrasound.
This study was conducted at Ain Shams University
maternity hospital covering the period from the first of June
2013 to the end of janauary2014.
In this study there were two hundred and thirty one
patients, who were healthy pregnant woman at term (36-40
weeks gestation) who were delivered at Ain-Shams maternity
hospital in the period from the start of June 2013 to the end
of January 2014.
F
Summary
118
This study aims to evaluate the correlation between the
fetal weight (estimated and actual) and both umbilical artery
Doppler and placental thickness in healthy pregnant ladies at
term.
Our work aimed to evaluate the clinical usefulness of
Doppler analysis of the umbilical artery velocimetry
waveform as well as the ultrasonographic study of the
placental thickness as a predictor of fetal weight.
from the results obtained in this study we found there
was no significant correlation between EFW and umbilical
artery PI or S/D ratio, but there was a highly significant
correlation between EFW and placental thickess, and also found
that there was a significant correlation between EFW and actual
fetal weight.
The results of this study were summarized as follow:
No maternal and perinatal mortalities were detected
among studied patients.
There was no significant correlation between EFW and
umbilical artery PI or S/D ratio; Pearson’s test gave r-values of
0.127 for PI 36–41 weeks, so the results of this study do not
support the hypothesis that there is a relationship between the
most commonly employed indices of umbilical artery FVW
resistance and EFW in low-risk pregnancies.
Summary
119
The absence of a relationship between them, despite the
well-recognized relationship between fetal weight and placental
size, implies that differences in placental size (and therefore
resistance to flow) between fetuses of different weights within
the same narrow gestational age ranges contribute little or
nothing to the overall FVW pattern.
There was a highly significant correlation between EFW
and placental thickess; Pearson’s test gave r-values of 0.57 for
placental thickness in 36–41 weeks, so the results of this study
support the hypothesis that there is a relationship between the
placental thickness and EFW in low-risk pregnancies.
This implies that placental thickness can be used as a
fairly accurate indicator of normality of fetal weight, but because
of wide variations in placental thickness corresponding to
particular fetal weight a more thorough search should be
undertaken when a fetus is considered to be at risk.
There was a significant correlation between EFW and
actual fetal weight; Pearson’s test gave r-values of 0.824 for
actual fetal weight 36–41 weeks, so the results of this study do
not support the hypothesis that there is a significant error in the
estimation of the fetal weight by ultrasound.
This implies that ultrasound does not have a high
estimation error. Depending only on the fetal ultrasound may
Summary
120
help determine obstetrical interventions, but we suggest that
ultrasound findings need to be correlated with physical
examination anyway to give an idea about birth weight, keeping
in mind that ultrasound measurements are operator dependent.
So the high percentage of error in the estimation of the fetal
weight may stem from the operator dependence of the
procedure.
There was no significant correlation between pulsatility
index and actual fetal weight; Pearson’s test gave r-value of
0.124, for PI 36–41 weeks, but approaching significance, so the
results of this study do not support the hypothesis that there is a
relationship between the most commonly employed indices of
umbilical artery FVW resistance and actual fetal weight in lowrisk
pregnancies.
The results were approaching significant P-value, thus
further researches are recommended.
There was a highly significant correlation between actual
fetal weight and placental thickess; Pearson’s test gave r-values
of 0.488 for placental thickness in 36–41 weeks, so the results of
this study support the hypothesis that there is a relationship
between the placental thickness and actual fetal weight in lowrisk
pregnancies.
Summary
121
There was a highly significant correlation between EFW
and gestational age; Pearson’s test gave r-values of 0.905 for
estimated fetal weight 36–41 weeks, so the results of this study
support the hypothesis that there is a relationship between EFW
and gestational age in low-risk pregnancies.
There was a highly significant correlation between actual
fetal weight and gestational age; Pearson’s test gave r-values of
0.745 for actual fetal weight 36–41 weeks, so the results of this
study support the hypothesis that there is a relationship between
actual fetal weight and gestational age in low-risk pregnanc