Free Beta-human Chorionic Gonadotropin (Free Beta-hCG)
- Sample Type
- Standard
- Fasting
- No
- Unit
- ng/mL
Free Beta-hCG is the unbound subunit of the hCG hormone. In the context of a Dual Marker screen (usually performed between 11-14 weeks of gestation), it is used to calculate the statistical risk of fetal chromosomal abnormalities. It is a vital biomarker for identifying Trisomy 21 (Down Syndrome) and Trisomy 18 (Edwards Syndrome). Its value is typically combined with PAPP-A and ultrasound findings (Nuchal Translucency).
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
The interpretation relies heavily on the exact gestational age determined by ultrasound (Crown-Rump Length). Even a few days' discrepancy in dating can move a result from 'normal' to 'high risk.' Furthermore, maternal weight, smoking status, and IVF pregnancy status require complex mathematical adjustments (MoM - Multiples of Median).
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Free Beta-human Chorionic Gonadotropin (Free Beta-hCG):
Official Sources
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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