Free Online Down Syndrome Screening Gender Prediction Tool
Predict baby gender using AFP and hCG values - no data upload required
Enter Screening Results
Normal range: 0.7 - 2.5 MOM
Normal range: 0.5 - 2.0 MOM
Non-medical fetal gender identification is prohibited in many countries. This tool provides entertainment only and should not be used for medical decision-making.
Prediction Results
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Enter your screening results and click "Analyze Results"
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Prediction Rules Explanation
Boy Prediction Indicators
Based on β-hCG and AFP values
- β-hCG MOM value < 0.4
- AFP MOM value > 1.0
- Low β-hCG and high AFP
Empirical accuracy 65%-75%, not medically validated
Girl Prediction Indicators
Based on β-hCG and AFP values
- β-hCG MOM value > 0.8
- AFP MOM value < 1.0
- High β-hCG and low AFP
Empirical accuracy 60%-70%, not medically validated
Medical Information
True purpose of screening
Down syndrome screening assesses risk for trisomy 21, not gender detection.
Non-medical fetal gender identification is prohibited in many countries
Down Syndrome Screening and Baby Gender Prediction Guide
Purpose of Down Syndrome Screening
Down syndrome screening (commonly called prenatal screening) is a method to assess the risk of fetal chromosomal abnormalities like trisomy 21. Typically performed between 15-20 weeks of pregnancy, this test measures specific biochemical markers (AFP, hCG, uE3) in maternal blood combined with maternal age, weight, and gestational age to calculate the probability of chromosomal disorders.
Relationship Between AFP/hCG and Fetal Gender
While the primary purpose of screening is to detect chromosomal abnormalities, some studies suggest correlations between biochemical marker levels and fetal gender:
- AFP (Alpha-Fetoprotein): Typically higher in pregnancies with male babies
- hCG (Human Chorionic Gonadotropin): Typically higher in pregnancies with female babies
These correlations may stem from placental function differences but are generally small and vary between individuals, making them unreliable for definitive gender determination.
Scientific Basis of Gender Prediction Accuracy
Current medical consensus indicates that gender prediction through screening results lacks sufficient scientific validation:
- Studies show prediction accuracy between 60-70%, significantly lower than medical gender determination methods
- Testing methods and reference ranges vary between laboratories
- Individual factors (age, weight, ethnicity) affect marker levels
- Multiple pregnancies significantly impact results
Therefore, predictions from this tool are for entertainment only and cannot replace professional medical testing.
Medically Recognized Gender Determination Methods
Current medically accepted fetal gender determination methods include:
- Ultrasound: Gender determination through fetal anatomy observation after 16 weeks (~95% accuracy)
- Non-Invasive Prenatal Testing (NIPT): Fetal DNA analysis from maternal blood (>99% accuracy)
- Amniocentesis: Direct chromosome analysis of fetal cells (100% accuracy but invasive)
Note: Non-medical fetal gender identification is prohibited in many jurisdictions and should only be performed under medical supervision.
Frequently Asked Questions
How does Down syndrome screening predict baby gender?
Prediction based on AFP and hCG MOM value combinations:
- AFP < 1 and hCG > 0.5 → 95% probability of female
- AFP > 1 and hCG < 0.5 → 95% probability of male
- hCG between 0.5-1: AFP > 1 → likely male, AFP < 1 → likely female
- Both AFP and hCG > 1 → higher probability of male
- Both AFP and hCG < 1 → higher probability of female
How accurate is gender prediction using screening results?
Accuracy reaches 95% in specific combinations (e.g., AFP<1 and hCG>0.5), with overall accuracy between 60-70%. Note this is empirical prediction without scientific validation, and actual accuracy may vary.
What are normal AFP and hCG ranges?
Normal MOM value ranges: AFP 0.7-2.5, hCG 0.5-2.0. These values may vary based on gestational age, maternal age, and weight.
How quickly will I get prediction results?
Our tool provides instant predictions. After entering AFP and hCG values, click "Analyze Results" for immediate calculation.