AFP MoM Calculator

Calculate your Alpha-Fetoprotein Multiple of Median (MoM). This tool helps translate your lab results into a standard metric used by clinicians.

Found on your lab report or provided by your doctor.
Weight can impact AFP concentration in the blood.
Calculated MoM
1.12

Normal Range: 0.5 – 2.5 MoM.

What is a MoM?

I genuinely believe that "MoM" (Multiple of Median) is one of the most confusing terms for patients. Because laboratories use different units and medians vary by the week of pregnancy, doctors use MoM to standardize the results. A MoM of 1.0 means your result is exactly the average (median) for your week of pregnancy.

High vs Low AFP: A high AFP (usually above 2.5 MoM) might indicate a risk of neural tube defects like spina bifida. A low AFP might be associated with an increased risk of Down syndrome. However, remember that these are screening tests, not diagnostic tests. Most "abnormal" results turn out to be healthy babies!

Important Factors:

  • Weight: Heavier mothers tend to have lower AFP levels because they have a higher blood volume.
  • Ethnicity: African-American women often have naturally higher AFP levels.
  • Diabetes: Mothers with Type 1 diabetes usually have lower AFP levels.