Exam

Midparental Height

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Midparental Height, Calculation of Growth Delay, Calculation of Growth Excess

  • See Also
  1. Growth Assessment
  2. Failure to Thrive
  3. Short Stature
  4. Tall Stature
  • Approach
  • Step 1 - Calculate Final Height prediction (mid-parental height)
  1. Boy
    1. In: (Father's Height + Mother's Height + 5) / 2
    2. Cm: (Father's Height + Mother's Height + 13) / 2
  2. Girl
    1. In: (Father's Height - 5 + Mother's Height) / 2
    2. Cm: (Father's Height - 13 + Mother's Height) / 2
  • Approach
  • Step 2 - Identify Predicted Growth Percentile
  1. Use above predicted mean height to mark growth chart
    1. Mark chart at 18-20 year old mark
    2. Mark Confidence Intervals
      1. Mean Height in inches +/- 2 inches (some use 3.3 or 4 inches)
      2. Mean Height in centimeters +/- 5 centimeters (some use 8.3 or 10 cm)
  2. Identify growth percentiles for the predicted height
  • Approach
  • Step 3 - Indications for growth evaluation
  1. By age 2 years, children reach their genetically programmed growth percentile (based on mid-parental height)
  2. Child over age 24 months should fall into above percentiles
    1. Growth should at least parallel the 3rd or 97th percentile line
  3. Pursue growth evaluation for any child below minimum or above maximum