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English: Ultrasound image of the fetal head at 20 weeks of pregnancy in a fetus affected by spina bifida. In the axial scan the characteristic lemon sign and banana sign are seen. Deutsch: Ultraschall des Schädels eines 20 Wochen alten Fetus mit spina bifida.
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15% (occulta), 0.1–5 per 1000 births (others) [7] [8] Spina bifida ( SB ; /ˌspaɪnə ˈbɪfɪdə/, [ 9 ] Latin for 'split spine') [ 10 ] is a birth defect in which there is incomplete closing of the spine and the membranes around the spinal cord during early development in pregnancy . [ 1 ]
Anatomy scan of the fetal head at 20 weeks of pregnancy in a fetus affected by spina bifida. In the axial scan the characteristic lemon sign and banana sign are seen. Anatomy scan with power bi-directional colour Doppler of both fetal kidneys at 18 weeks of pregnancy to detect renal agenesis. The videoclip shows a frontal scan with normal renal ...
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The sex of the fetus may be discerned by ultrasound as early as 11 weeks' gestation. The accuracy is relatively imprecise when attempted early. [15] [16] [17] After 13 weeks' gestation, a high accuracy of between 99% and 100% is possible if the fetus does not display intersex external characteristics. [18]