Annals of Saudi Medicine
Publication of the King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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Year : 2010  |  Volume : 30  |  Issue : 2  |  Page : 134-140

Fetal weight normograms for singleton pregnancies in a Jordanian population

1 Department of Applied Sciences, Al-Huson University College, Al-Balqa Applied University, Irbid, Jordan
2 Department of Obstetrics and Gynecology, Faculty of Medicine, Mutah University, Al-Karak, Jordan

Correspondence Address:
Nahla Subhi Al-Bayyari
Department of Applied Sciences, Al-Huson University College, Al-Balqa Applied University, Irbid

DOI: 10.4103/0.


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Background and Objectives : Estimated intrauterine fetal weight (EIUFW) is important for reducing prenatal mortality and morbidity through early detection of faltering growth. Our objectives were to develop patterns of ultrasonically determined EIUFW by gestational age, for normal singleton pregnancies, and to assess the effect of a number of variables on EIUFW. Methods : Ultrasonically, EIUFW was obtained from 600 pregnant women who were at 20 to 42 weeks of gestation (WG). EIUFW was categorized into low weight and normal weight using the tenth and twentieth percentile as the cut-off points. Logistic regression was used to calculate the odds ratio and their 95% confidence limits for a number of risk factors hypothesized to be associated with low fetal weight. EIUFW percentiles (twenty-fifth, fiftieth, and seventy-fifth), by gestational age and sex, were calculated for singleton pregnancies. Results : Up to 32 WG there was no statistically significant difference between male and female fetuses in EIUFW. Between 32 and 39 WG males had significantly (P<.05) higher fetal weight than females. Charts of ultrasonically determined EIUFW by gestational age and sex for singleton pregnancies were created. A number of variables were significantly associated with EIUFW such as pregnancy weight gain, maternal hemoglobin level, frequency of antenatal visits, smoking status, and fetal sex. Conclusion : Weight gain during pregnancy should be encouraged for pregnant mothers who gain less than one kilogram per month in the second and third trimester. A prospective study on a national representative sample in Jordan is needed to generate our own standards for fetal growth.

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