1. First, baby's limbs are brought back to midline. This is a very powerful technique for calming babies (older children and adults too..think about how powerful a hug can be when your arms are squished hard into your chest). Harvey Karps technique (the first S-swaddle) does this too, with the added benefit of you not having to maintain it,so baby can calmly go off to sleep and you have your hands free.
2. The second commonality is the 45 degree angle. The second S (side lying) accomplishes the same outcome. Why it works is because newborns have a strong Moro reflex (feel like they are falling when on their backs). This angle turns that reflex off.
3.The third similarity is the 4th S-swinging. This is the most misunderstood S of the bunch. Basically you want baby to be bouncing,swinging, moving where the body is mimicing a bowl of jello. This is super soothing as it mimics the fluidity of movement in the womb. Babies often find the still ness of a crib maddening. Babies love to sleep in a carrier, car seat or in the stroller. Dont let anyone tell you that the quality of your babies sleep is demished when not in a crib.
So in a nut shell this is a wonderful technique for soothing newborns! I do think there are a few added bonuses to the 5 S's but every baby is different.and some may prefer this technique. The only thing I DID NOT LIKE was at the end when the doctor said the baby was "good" because she/he easily calmed. I am tired of the idea that babies are good or bad. We hear this all the time with sleep. Good sleepers don't make "good babies" or have "better parents". Your baby is good regardless if they sleep, eat, poop or sooth quickly. They just are.
Happy baby calming everyone!