![]() ![]() ![]() However, such studies are rare among Africans, especially Nigerians. Previous reports have investigated possible relationships between sonographically attained fluid index, and estimated fetal weight (EFW) including the influence of AFI on the accuracy of sonographically EFW, among Caucasians. It is therefore, reasonable to postulate a relationship between sonographically determined amniotic fluid index (AFI) and estimated FW. In late pregnancy, amniotic fluid production is largely dependent on fetal micturition and renal size in the newborn has been shown to bear a significant relationship to birth weight. Armed with this information informed decisions about delivery can be taken, thereby minimizing perinatal morbidity and mortality.Īmniotic fluid cushions the fetus from traumatic forces, cord compression, and pathogens, as well as playing an essential role in fetal lung development. This is particularly important when dealing with growth restricted or large for date babies. Sonographic estimation of fetal weight (FW), especially in late pregnancy is an important guide in obstetric care. The implication of this is that fetal size need not be taken into cognizance when alterations in amniotic fluid values are noted. While FW calculations and amniotic index showed variations in value in late pregnancy, there does not appear to be a linear relationship between ultrasound estimate of FW and amniotic index. Overall, there was no statistically significant relationship between AFI and EFW ( P > 0.05 r = 0.241). The mean AF1 and estimated fetal weight (EFW) pairs were as follows: at 27-29 weeks the values were 172.1 mm and 1,250.2 g at 30-32 weeks AF1 and EFW values were 170.3 mm and 1,648.0 g at 33-35 weeks values were 162.3 mm and 2,273.5 g at 36-38 weeks values were 144.09 mm and 2,906.1 g at 39-40 weeks AF1 and EFW values were 125.0 mm and 3,222.6 g. The level of statistical significance was set at P ≤ 0.05. ![]() Spearman's correlation was used to test possible relationship between amniotic fluid indices and estimated FW pairs. AFI was assessed using the 4-quadrant method. FW was estimated using a combination of fetal parameters bi-parietal diameter, fetal trunk cross sectional area, and femur length. Two hundred and fifty-eight low-risk pregnancies were prospectively studied by means of ultrasound over a 12-month period. There possibly exists a relationship between FW and amniotic fluid index (AFI) that can be estimated by ultrasonography. Amniotic fluid protects the fetus against traumatic and infective insults. Fetal weight (FW) estimation in late pregnancy is an important guide in obstetric care. ![]()
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