Sleep update

Originally, back in November, I posted about Isaac's remarkable consistency in sleep habit -- for four months straight, when he was between ten and 13 months of age, he was asleep an average of 12 out of every 24 hours. Everything seemed very predictable, and I felt like I had it all figured out.

Then three weeks later I posted about a dramatic change -- in his 14th month, Izzy was now sleeping an average of 13 hours per 24 hour period! The big spike on the graph looked impressive, and seemed statistically significant. Things were changing, which was bad, but at least it was for the better, which was good.

Now let's take a look at his current monthly sleep average chart, courtesy of Trixie Tracker:



Now that the 14th month is complete, its sleep average has come down somewhat and it doesn't look that impressive anymore. Yes, Isaac on average slept more than his typical 12 hours, but certainly less than the 13 hours I had originally found so exciting.

But what happened during the 15th month? My regular readers may recall some dark days involving separation anxiety, travel, and illness. I knew at the time that things were bad, but it took the sleep average chart to reveal that Isaac hadn't slept so little since he was six months old.

Actually, here's a more revealing way to look at the average sleep chart -- by weeks, rather than by months:

So it turns out that it wasn't the entire 15th month that was so bad -- it was just the 68th week.