Gör en mer avancerad sökning ». Författare: Marija Simic ; Karolinska Institutet. Sammanfattning: Accurate estimation of the gestational age GA of the fetus is a key assessment made by providers of obstetric care during pregnancy, since decisions concerning management strategies are dependent on this estimate. Thus, the prognosis for preterm infants born at the border of viability is strongly dependent on the accuracy with which GA can be determined. The aim of the present theses was to investigate the impact of maternal obesity, different procedures for dating and the different formulas employed in connection with ultrasonographic values on the estimation of gestational age. Furthermore, the incidence of and factors that influence the one-year survival of infants born extremely preterm were explored. The chance for survival without any major morbidity increased significantly with advancing gestational age at birth, from 9.
With the introduction of obstetric ultrasound there has been a shift from last menstrual period-based to ultrasound-based estimation of gestational age.
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