4 months

15 Apr

So, we took BB to the pediatrician for his 4 month checkup and vaccinations. He’s now 16 lbs. 3 oz. (with shoes, but not with the bar). Let’s call it an even 16lbs. And he’s 26.5 inches tall. This puts him in the 70th percentile for weight, and 90th percentile for height. I put together an instructive (and predictive) graph:

Doing a little math, we can compute linear equations to determine his height/weight going forwards, as I’m sure you all remember from your high school math classes (y=mx+b, where y is the value for height or weight, m is the slope of the line, x is the number of months, and b is the y-intercept).

For height, in centimeters: y = 4.445x + 49.53
For weight, in grams: y = 1041.875x + 3090

So, at birth, he was 49.53cm, or 19.5 inches. At four months, 26.5 inches (2′ 2.5″)! At 12 months, we can predict that he will be 40.5 inches (3′ 4.5″)! And we can predict with confidence that our five-year-old will be 124.5 inches (10′ 4.5″). Hello basketball scholarship!

Likewise, at 1 year, he’ll weigh 34 lbs., 6 oz. And at 5 years, he’ll weigh almost 145 pounds. He’ll be the tallest, skinniest man in the whole wide world! Finally we’ll have someone who can change that pesky light bulb that went out in our bedroom fixture.

I’m sure I don’t need to run the numbers on his neurological development, needless to say we’ll have an insanely smart teenager (and don’t even get me started on the trajectory of his genital growth).


3 Responses to “4 months”

  1. Davin April 17, 2011 at 12:51 pm #

    Wow. Well, numbers don’t lie. I don’t want to alarm you guys, but maybe you should get Bilbo checked for acromegaly…

  2. Peter April 17, 2011 at 4:48 pm #

    Um, I don’t want to tell you your business ‘doctor’, but according to the NIH, “excessive production of growth hormone in children causes gigantism rather than acromegaly.” Gigantism.

  3. Davin April 18, 2011 at 9:43 am #

    Potayto, potahto.
    Either way, that’s a dangerous trajectory you’ve got there.

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