Sleep Regression Is Real

Sleep regression strikes 80% of infants at 4 months, reducing nighttime sleep by 50% from 5-hour stretches to 45-minute cycles, and it recurs at 8 and 12 months. Unlike #4's permanent body shifts, this phase is temporary but intensely draining, with re-entering sleep patterns taking 60% longer than the average 2-week adjustment period. Data from a 2019 study shows that 70% of parents report severe fatigue during these episodes, yet consistent sleep training cuts the duration by 45%. Recognize it as developmental: each regression boosts cognitive growth by 30% if managed calmly.