Percentily ultrazvukových měr (BPD, HC, AC, FL)
Zadejte týden těhotenství a ultrazvukové míry BPD, HC, AC a FL a uvidíte přibližné percentily a to, jak vyrovnaně míry vypadají. Pouze vzdělávací pomůcka, nejde o lékařskou radu.
What measurements can I enter?
You can enter **BPD, HC, AC and FL** in millimetres together with gestational week. You may use one, some or all four, depending on what was measured in your scan.
What does the percentile actually mean?
The percentile shows how your measurement compares to a **modelled average** for that week. For example, the 25th percentile is lower than most babies in this model, but still inside the broad typical band.
What counts as “Small”, “Average” or “Large”?
The context stat treats: - Below the **10th percentile** as *small* - Between **10th and 90th** as *average* - Above the **90th percentile** as *large* These are approximate and do not replace your clinic’s own cut-offs.
How is proportionality between measurements checked?
The tool compares the **Z-scores** of all entered measurements and looks at the **spread**. If they are within about **one standard deviation** of each other, it calls this “Proportions look consistent”. Bigger spreads give “Mild differences” or “Noticeable differences”.
Do I need all four measurements?
No. You can use any subset. Percentiles are only calculated for the measurements you enter. For proportionality you need at least **two** valid measurements.
Is my data saved or shared?
The calculator uses your week and measurements only to render results on screen. Check the site privacy policy for how general website usage is logged, but it is not a medical record.