When performing chest compression for babies, the preferred technique should be one cycle of 3 compression and 1 ventilation should take approximately 2 seconds or 1/3 the anterior-posterior diameter of the chest.
While doing the 2-finger technique for chest compression, the second hand must support the back of the baby and the compression chanting must be One-and-Two-and-Three-and-Breath.
Moreover, the compression to ventilation ratio in one minute for newborn is 90 compressions: 30 ventilations.