الفهرس 
The Human PlacentaOnly 14 pages are availabe for public view
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Abstract
Assessment of fetal weight is crucial in our daily obstetric practice, particularly in the third trimester. It guides obstetricians to make up their determinations as regard time and mode of delivery to guard against adverse outcomes of low birth weight and macrosomic babies during labor and puerperium. Placental thickness is very much allied to fetal development and may be a keynote in perinatal outcome. Studies have shown that diminished placental size heralds fetal growth retardation as IUGR is concomitant with impoverished villous development and fetoplacental angiogenesis. In light of that, the aim of this work was to study the correlation of placental thickness, measured at the level of the umbilical cord insertion, with the ultrasonographic gestational age in normal and IUGR pregnancies in the late second and third trimester. This study was carried out on 100 pregnant women who attended the outpatient clinics or the inpatients wards at Obstetrics and Gynecology department, Tanta University Hospital from December 2019 to December 2020. All women had a singleton pregnancy with gestational age ≥24 weeks. The subjects were divided into 2 groups: group I: 50 women had neonatal birth weight <2,500 g and group II: 50 women had outcome fetal weight ≥2500 g. Our results illustrated that the average birth weight in group I was 1871.3 ± 233g ranged from 1350-2475 g versus 2500 – 3400 g in group II with mean birth weight 2784.1±214.3 g. This indicated a statistically significant difference between both groups (P<0.001). The present study indicated that 26 out of 50 (52%) of newborns in group I had a birth weight below the fifth percentile and 24% of them had a birth weight ranged between 5 th -10 th percentile for gestational age and sex at the time of birth whereas all newborns of control cases had a birth weight >10th percentile for gestational age and sex.