「Vigorous shaking settles a baby faster」

Newborn Sleep 101: The Only Four Things That Matter in the First Three Months

Forget sleeping through the night. Read sleep cues, use daylight, and hold the safe-sleep line — the first trimester of sleep is simpler than it looks.

Decoding Your Baby's Cry: A Checklist, and What to Do When Nothing Works

Hungry, tired, gassy, needing contact — check in order of probability; understand the witching hour and colic; and the one right move when you are at your limit.

The 4-Month Sleep Regression Is Actually an Upgrade — Here's the Playbook

A permanent maturation of sleep architecture, not a phase to wait out. Independent settling, a fixed routine and watched wake windows help your baby run the new system.