I was curious about this so I asked a few friends that had babies. I asked about all their children, how big were they at birth and how big are they now.
It was all over the charts. Some people that had big babies their kids are small now. Ones that had little babies have big kids now.
For example, One friend had a 6 pound 3 ounce, 19 inches long boy. As a child he was usually between the 50th to 75th percentile for height and weight. Seems a little small but he is now 20 years old and 6 feet 2 inches tall and thinks he weighs about 190 pounds. Now in the 89th percentile for weight and 94th for height.
Another friend had a 8 pound 9 ounce, 20 inches long girl. By the time she was two she didn’t even make the charts for percentile because she was so little. She is now in her twenties and is 5 feet tall and 95 pounds.
Another baby was 7 pounds 13 ounces 19 inches she is now 3 years old and is 35 pounds and 3 feet tall. At the 75th percentile for weight and at the 10th percentile for height. Her brother 7 pounds 12 ounces and 18 inches long. He is now two years old weighing 26 pounds and is 2 feet 9 inches. He is at the 35th percentile for weight and at the 24th percentile for height.