Description: A baby's developmental check-up is a measure of how well their brain is developing. It's not simply about tracking whether a baby's physical growth matches their age — it's an important test that reveals how well the brain is developing at each stage. As babies grow, holding their head up, crawling, walking, responding to sound, speaking, picking up small objects with thumb and finger, and playing with peers may seem like a natural progression, but all of these milestones are only possible when the neural networks appropriate to that age have developed properly. When a baby's brain development isn't sufficient, it becomes difficult for motor, language, and cognitive development to progress as expected for that stage. This book provides developmental characteristics and parenting guidance for each stage, along with simple at-home tests for motor, language, and behavioral development, as well as developmental play activities. The 'At-Home Baby Development Tests' included for each stage are designed to help catch any delays in growth or development early. Even if you don't read the entire book, we hope you'll make sure to complete these at-home tests at the appropriate stage so that any potential developmental delay can be caught early and addressed by a professional. Parenting approaches should be tailored to each baby's developmental characteristics. For first-time parents with no prior childcare experience, everything about their baby can feel worrying. Unlike in the past, when families raised children together, today's parents often lack support from those around them, leaving them anxious about everything — when their baby should hold their head up, whether their head circumference is too large, when they should crawl or walk, when they should start talking, and so on. The overwhelming amount of parenting information online can leave parents feeling even more lost. Not all babies grow at the same pace or in the same way. Each baby has a different temperament and different inherited traits. That means parenting methods and play approaches should be adjusted to fit your own baby's developmental characteristics. Efforts that don't match your baby's actual developmental stage can end up causing them stress. Being a little ahead or a little behind compared to other babies doesn't carry much meaning. That's why it's important to understand your own baby's developmental characteristics while also building a foundational understanding of the overall developmental process. With this foundation, you can create a parenting roadmap tailored to your baby — reducing anxiety and stress along the way. Thorough Information and Detailed Guidance to Map Out Your Baby's Parenting Journey This book comes in two volumes: the main book and a special supplementary volume. The main book offers detailed explanations — using illustrations and QR-code videos — of developmental characteristics at every stage, from the prenatal period through 60 months after birth. Once a baby is born, time tends to fly by as parents become absorbed in day-to-day care. This book is organized by developmental stage and topic, making it easy to quickly find the section you need. If you're still in the pregnancy stage and have some time and mental space, we recommend reading through the entire book once with the family members who will be involved in raising the baby. Understanding the full growth and developmental process from birth to 60 months before your baby arrives will be a great help in understanding your baby's behavior and setting a direction for how you'll raise them. A Handy Companion for Busy Parenting: The Special Supplement 'At-Home Baby Development Tests 55 & Baby Development Play Activities 117' This special supplementary volume is designed to be grabbed and used right away once your baby is born and the whirlwind of real-life parenting begins. It features 55 more detailed developmental test methods and 117 developmental play activities to enjoy with your baby, organized by developmental stage. Detailed illustrations explain each test and play method so that first-time parents — who may not have an experienced friend or family member to turn to for advice — can easily follow along. In addition, for parts that may be hard to fully convey through illustrations alone, short videos accessible via QR code are included to help new parents better understand each activity. [Content continues, detailing your baby's developmental characteristics...]