How to stimulate the most important developmental weeks in your baby's first 20 months and turn these 10 predictable, great, fussy phases into magical leaps forward.

The worldwide bestseller and multiple award winning The Wonder Weeks describes the incredible mental developmental changes (leaps) and regression periods that all babies go through. 

Based on the scientific — and parental — world-changing discovery of a phenomenon: all healthy babies appear to be more fussy at very nearly the same ages, regression periods, and sleep less in these phases. These age-related fluctuations in need for body contact and attention (regression periods) are related to major and quite dramatic changes in the brains of the children. These changes enable a baby to enter a whole new perceptual world and, as a consequence, to learn many new skills.

Understanding the real reason behind crying, eating, and sleeping problems is the only real solution every parent needs.