[Maritime Q-Scout]

My wife noticed this the other day.

For the last week our son has slept through the night about half the time. The other half he would wake up at about 3 or so crying. When he does that we have to get up to soothe him or take him into bed with us (yes, yes, I know the cry it out theory, not my question).

Here's what's interesting.

When I put him down he sleeps through the night.

When my wife puts him down he wakes at 3am.

Last night we experimented by me putting him down, and again he slept through the night.

Why would this be?