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Do Kidneys Grow After Birth?

Published in Kidney Development 1 min read

Yes, kidneys grow after birth.

Kidney Growth After Birth: An In-Depth Look

The kidneys undergo significant growth after birth, primarily during specific periods of development. Here's a detailed overview:

  • Initial Size at Birth: At birth, a child's kidneys weigh approximately 50 grams, which equates to about 1.6 grams per 100 grams of body weight.

  • Periods of Intense Growth: Kidney growth is most rapid during the following stages:

    • First 1.5-2 years of life: This is a period of significant overall growth and development, including the kidneys.
    • 8-10 years: Another phase where the kidneys experience notable growth.
    • 14-18 years (adolescence): This stage coincides with puberty and the associated growth spurts.
  • Adult Size: By the time a person reaches 22-25 years of age, the kidneys typically weigh around 270 grams, or about 0.45 grams per 100 grams of body weight,

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