A baby's gender is typically determined during a prenatal ultrasound scan, specifically at the 12-week scan. This method relies on observing a specific anatomical feature called the "nub."
Understanding the Nub Theory
The nub theory is used to predict the baby's sex at the 12-week scan. The nub is a small protrusion located near the baby’s genitals, and its direction helps in gender assessment.
- How it works: The sonographer examines the angle of the nub relative to the baby’s spine.
Gender Identification
The 12-week scan is significant in determining the baby's sex because this is when the nub starts to differentiate based on gender.
| Direction of Nub | Likely Gender |
|---|---|
| Pointing Vertically | Boy |
12-Week Scan Procedure
During the 12-week scan, the ultrasound technician will:
- Position the mother comfortably.
- Apply gel to the abdomen.
- Use an ultrasound transducer to view the baby.
- Identify the nub.
- Assess the angle of the nub to predict gender.
Important Note: While the 12-week scan can provide a good indication, it is not always 100% accurate. The anatomy is still developing, so the accuracy improves as the pregnancy progresses. Later scans, such as the 20-week anatomy scan, usually offer definitive results with higher precision.
