The goal of this observational study is to evaluate fetal cerebroplacental ratio at term and its relation to adverse neonatal outcome in patients with gestational diabetes. The main question\[s\] it aims to answer are: * To evaluate the efficacy (sensitivity \& specificity) of fetal cerebroplacental ratio at term in prediction of adverse neonatal outcome in pregnancies complicated by gestational diabetes * To evaluate the difference in fetal cerebroplacental ratio in patients treated by insulin \& those on metformin * to evaluate the incidence of adverse neonatal outcome in patients treated by insulin \& those on metformin. Participants will undergo ultrasound and doppler study at 37 weeks \& every two weeks thereafter till delivery. Neonatal assessment will be done after delivery to exclude adverse outcomes.
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To evaluate the efficacy (sensitivity & specificity) of fetal cerebroplacental ratio at term in prediction of adverse neonatal outcome in pregnancies complicated by gestational diabetes
Timeframe: 17 months