AREF THEORY
Aref theory or modified nub theory is an ultrasound-based method to predict a baby’s sex during the first trimester, using the angle of the genital tubercle (the “nub” or “angle of the dangle”) as a marker for sex determination. A nub angled upwards at 30 degrees or more suggests a boy, while a nub parallel or angled slightly downward is thought to indicate a girl. professional sonographers might achieve high accuracy, from 11 weeks, it is a foolproof and scientifically proven method except in cases of hypospadius .
How Nub Theory Works
- Obtain a Side-Profile Ultrasound Image: You need a clear, side-profile ultrasound image of the baby, typically from a 12-week scan.
- Locate the Genital Tubercle: Find the “nub,” a small protrusion located between the legs and the lower spine.
- Compare the Angle to the Spine: Observe the angle of the nub relative to the baby’s spine.
- Boy: If the nub is angled upwards, at 30 degrees or more relative to the spine, it suggests a male fetus.
- Girl: If the nub is parallel to the spine or angled slightly downwards, it suggests a female fetus.
Factors Affecting Accuracy
- Professional Interpretation: The studies showing high accuracy were conducted by highly trained ultrasound professionals, not by parents interpreting their own scans.
- Fetal Position: The baby must be in the right position and the image must be a clear profile for the assessment to be potentially accurate.
- Timing: The theory is more reliable after 12 weeks of gestation, with accuracy improving by 13 weeks.
- Developmental Variation: There can be significant differences in fetal development between 11 and 14 weeks, leading to potential misinterpretations.
معرفه نوع الجنين مبكرا بالسونار رباعي الأبعاد و الدوبلر مع د.هيثم عارف في التراسكان Aref Theory
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معرفه نوع الجنين مبكرا اونلاين مع مستشار السونار د.هيثم عارف