Dutch researchers have coined the term wonder weeks to describe the process of infant intellectual development in the first 20 months of life.
Wonder weeks are also called your crisis week, your stormy week, your week of change, or your week of sudden impulse. There are 10 specific times when the little angel begins to show intellectual and cognitive development. These major advances are related to changes in the brain and nervous system, helping the baby to expand awareness and senses. However, infant intellectual development often comes with periods where parents find it difficult. Babies will cry often, stubborn, quirky, often hungry or have poor appetite and have disturbed sleep.
1. Midweek 4 to midweek 5
As metabolism develops, so does head circumference. Your baby will notice more things going on around them. After this week, your baby will be able to observe things more often, react to each time you touch it, begin to smile, react to smells, and often wake up brighter.
2 . Around midweek 7 to midweek 9

This week your baby will be able to recognize simple shapes in space or begin to use limbs of the body, beginning to recognize the familiarity of certain people and objects they see. After this time, the little angel can raise her head more steadily as well as turn her head towards the sound, begin to show signs of wanting to hold, explore, observe parts of the body and create sounds. The sound is like a babble.
3. Mid-week 11 to mid-12
At 11 weeks of age, your baby will know how to use his senses to discern the order and existence of objects in their surroundings, sound transition, movement, light, taste, and smell. and texture.
After this week, your baby will learn how to track something, be more active and cheerful, and can turn in different directions or want to sway from the abdomen to the back, starting to create noises such as screaming or buzzing, reacting to sounds like laughter, are attentive to light and enjoy hearing sounds at different pitches.
4. Between week 14 and midweek 19
Infants can understand how the sequence of actions will result and test how things happen. After this week, your baby will be more active such as:
Have better grip skills
Know how to put everything in your mouth
Get plenty of exercise with your toys
Knowing how to look for parents and relatives
Respond to your own image in the mirror
Recognizes his name
Stop while feeding, push the nipple or bottle out when full, and show impatience or depression.
5. Midweek 22 to midweek 26
As children get older, they can move better because their limbs work closely together. At this point, the little angel knew the relationship between everything. Children will often feel stress and anxiety because now they can recognize the distance as well as feel lonely and unsafe when leaving their parents.
![Wonder weeks: The week when he was suddenly hard to live]()
After this week, babies also get excited about different people's actions, take care of small details, start lifting and throwing things to explore and see what they can do. I will try to disassemble everything, put food in someone else's mouth, understand meaningful words to follow, blow bubbles by spraying saliva, make a sound with my tongue, start standing up with support. aid from adults.
6. Midweek 33 to midweek 37
Children can recognize grouped or categorized things, distinguish the features of objects and want to explore. After this week, your baby will understand some words, recognize their own reflection and be able to play games like peek-a-boo, imitate others, express their own feelings, enjoy playing games, singing and started to crawl .
7. Midweek 41 to midweek 46
Your baby will begin to understand sequences, steps to do something, and put actions together. After this week, your child will be able to answer simple questions, point at objects, know how to talk on the phone, imitate gestures, and try to dress herself.
8. Mid-week 51 to mid-54
At 51 weeks of age, your baby will test the sequence of individual actions and the consequences of those actions. After this week, your baby will understand dressing as a signal for an upcoming activity, show interest in things they want to do, learn to draw and use observation to learn.
9. Midweek 59 to midweek 61
![Wonder weeks: The week when he was suddenly hard to live]()
The baby enters the toddler stage , has a lot of physical skills, can imitate and act, use language to express emotions and engage people, can use and understand humor, yes can negotiate and haggle, try to do it your way. After this week, your baby will learn to express affection in many ways (including anger), begin to consider and think about the future and have some fears of not understanding.
10. Midweek 70 to midweek 76
By this time, the baby is nearly 20 months old, has the ability to understand words and be able to modify behavior to suit the circumstances. Babies also begin to develop empathy, using pictures and language skills to express emotions. After these weeks, children will also experiment with limits, learn about ownership and sharing, begin to have a fuller understanding of the concept of time, begin to speak and gain more knowledge.
Infants cannot master all the skills immediately after each development step. Instead, the baby will focus on the things that they like and simple. Keeping track of your baby's skills after wonder weeks will help you support him better.