How Is an Obstetric Ultrasound Done?
Ever wondered how ultrasound can be done? How about this obstetric-ultrasound? Would be easy? Is it painful? Definitely not! Obstetric Ultrasound is done by simply. Measurement of crown rump length accurately measures gestational age if performed before 13 weeks. After 13 weeks, the fetus becomes increasingly flexed so results are inaccurate. Alternatives that can be used after this include bi-parietal diameter, and/or head circumference, or femur length. Then Usually performed abdominally, although occasionally a vaginal scan is necessary and Nuchal translucency scans for risk of Down’s syndrome are best performed between 10-14 weeks