The situation is this: your 0-4 month old baby is fed, changed, burped, and not gassy, but she is still screaming uncontrollably. This is especially dangerous for women who are predisposed to postpartum depression, as it is exhausting and frustrating. Karp talks about a "calming reflex," activated by sensory inputs that are similar to the womb environment. The inputs are neatly arranged into a 5-step practice:
1. SWADDLE
Swaddle the baby tightly; she will be even madder if it's a loose fit!
2. SIDE (or stomach)
Hold the baby on her side or stomach.
3. SWING
Either jiggle the baby quickly or swing her in your arms. (Jiggling is not the same as shaking; you want the baby to look relaxed, not give her whiplash!)
4. SHUSH
Make a SHHHHH sound near the baby's ear. The sound of blood in the womb is as loud as a vacuum cleaner, so the quietness of this world is overwhelming! If you get tired and feel faint or dizzy, grab a white noise app or turn a radio to static.
5. SUCKING
Give the baby a pacifier or one of your fingers. Everly particularly likes my knuckles and the soft part below my thumb.
The key is to match the baby's intensity. If she is screaming, the swaddle has to be really snug, the SHH has to be really loud, and the swinging has to be distracting (as opposed to a rocking chair).
Here's a video (terrible quality, sorry) of me using this method to stop Everly's post-dinner crying. Unless something is wrong (needs to burp, gassy, hungry), this works every time.
Everett refers to this method as "the baby black magic", and I agree. Check out the book for yourself and let me know what you think!