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12 Month Old Baby: Development, Sleep and Milestones

An important condition for ensuring the normal physical and mental development of the younger generation is the control of their age patterns. It is necessary to know the specifics of the functioning of physiological systems at different stages of ontogenesis.

Having complete information about developmental characteristics, and individual and general growth rates is extremely important if you already have a child. This is especially true in the first year of life when the most intensive growth and progressive development occurs.

Parents must understand the principles of care, nutrition, the basics of safety, and the rules for caring for a child. We have collected all the most important and capacious information for each month of life for up to a year. Consider 12 months, the final age of infancy.

12 Month Baby Development

The highest rate of body growth in length was noted according to the results of observations of infants in the first year of life. This figure has grown by more than 50% since birth. Body weight changes even more significantly. Babies almost triple their weight by 12 months. Such intensive rates in growth and development will no longer be observed in a child.

It's The Size of
a Strawberry

Based on length and size of a baby at 10 weeks pregnancy we can compare it to strawberry.

It does not feel like anything yet inside your belly, but structure is there and soon enough it will grow big.

10 Week Baby Size

How Heavy is it?
0.15 oz ~ 4 gr

Bone structure and enlargement of head has made our baby at least to double in weight between week 9 and 10.

Slowly growing baby fetus is now at 4 grams or 0.15 ounces. Keep in mind that every baby weight during pregnancy is slightly different.

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Your Baby is
3.2 CM or 1.25 Inch

It’s hard to measure baby inside your belly during such early development stage.

Overall night is just above one inch or 3 cm. The baby is not measured head to toe yet as it is in round position.

Size week 10

Baby parts development summary

External changes in the body and shape of the skull are noticeable within 12 months. The child grows up, stretches, and becomes more harmonious in the constitution. Its muscle tone, mass, and work of skeletal muscles are changing.

The energy consumption of a child in 1 year of life is much less than that of an adult. This is due to the imperfection of the skeletal muscles which require the most energy to maintain. The formation of oxidative systems in many parenchymal organs (liver and kidneys) occurs in the first year of life. This causes significant changes in body heat production.

Stomach and digestionThe stomach is in a vertical position. This relieves regurgitation and burping. The muscle mass of the stomach grows. The secretion of hydrochloric acid is established and proteins are better digested. The activity of the gastric glands increases.

The excretory systemThe kidneys are still quite large. They still have a lobed structure. A stable water-salt homeostasis is maintained. The capacity of the bladder increases to 200 ml. The reflex to urination is fixed.

Brain – Brain mass doubles by 12 months. The number of cells in the nuclei of the vagus nerve is growing. The mass of the cerebellum increases by 4 times and averages 3 ounces.

Musculoskeletal systemThe growth of the spinal column continues. The sections of the spine increase evenly. Lumbar lordosis and sacrococcygeal kyphosis are finally formed. The center of gravity shifts. Curves of the spine are formed. Gradually strengthens the skeletal muscles.

Muscle activityIncreased muscle energy consumption. The structure of muscle fibers is changing. The overall muscle mass is growing. The muscles of the pelvis and legs mature completely. The muscles of the lower extremities become stronger and the tone completely disappears. The muscle activity of the hands increases.

Skull – Places covered with membranous connective tissue overgrow. A large fontanel is completely fused. The peak growth of the bones of the skull is recorded at 12 months. Large wings fuse with the body of the sphenoid bone.

Your Baby Growth at 12 month

The growth rate of the main dimensional parameters in a child slows down by the first year of life. The main ones at the moment are the improvement of new motor skills and mental achievements. The body length of babies at 12 months should be close to the established standards. Of course, there are exceptions and height can reach 80 cm and sometimes 86.

Body weight grows at approximately the same pace and reaches optimal values ​​by the year. The head circumference of babies at 1 year old remains the same as last month. For girls – 45 cm. For boys – 46.4 cm. The circumference of the chest still retains approximately the same dimensions as that of the head. The circumference of the chest for girls is 46 cm and for boys 47 cm.

12 Month Old Baby Milestones

The first year of life is a serious age date. This is the final age of the main stage of growing up. Progressive shifts in the physical development of the baby occur during this period, new achievements appear in the development of speech and psycho-emotional development.

There are no strict rules and regulations at the key points of development at this stage. All children develop according to an individual plan that is genetically determined. The baby does not have to be able to walk already, but he must independently rise and stand. The child does not have to say his first conscious words, but he must understand the speech of an adult.

Independence of choice and action Do not deprive the child of the opportunity to do something on their own. Let him take a spoon, smear himself with porridge, but eat himself. Let him pour water from a cup, but he will do it because he wants to.

The kid can decide which toy he likes best. This is possible only with a limited choice, that is, no more than 3 items. The desire for independence is an age-related feature of development that should not be interfered with.

Manifestation of character, whims, and priorities You will begin to notice how the baby displays negative emotions for longer than usual. It is extremely difficult to stop the hysteria and crying if the reason for the excitement is not clear.

A child may start freaking out during the game because the cubes do not want to stand straight and fall all the time. He may throw the toy because it stops making a sound. The kid begins to prioritize attachment to certain things, people, and activities.

Articulatory abilities and vocabulary The baby intensively practices his speech skills at 12 months. He tries new sounds and combinations of syllables. Words get longer and more complex. Each child chooses the syllables that are easiest for him to pronounce.

The active vocabulary of the baby includes 10 to 15 words by 1 year.

The emergence of more clearly defined interests A 1-year-old child already has favorite and disliked activities. He likes to swim but doesn't like washing his hair or brushing his teeth for example. The baby develops taste preferences.

He categorically refuses vegetable puree and loves fruit puree. The child tries to protest if something goes beyond his desires.

A complication of game activity Games in a one-year-old child become more complex. He puts the toy on the truck and drives it around. The kid can start combing the doll or feeding the teddy bear with a spoon.

He flails his finger angrily in imitation of his mother scolding him. The child grows up and through the game trains life skills. He plays life as he sees it.

Social development There is a strong interest in children. The kid keeps a distance from extraneous adults, is shy, afraid of some, and hides. The kid is an incomprehensible but very active dialogue with peers.

Often the first conflicts in groups arise due to a misunderstanding of such concepts as "yours" and "mine". The child with special interest enters the new children's team. Separation from his mother is not yet traumatic for him.

Those 12 months that the baby has passed since birth cannot be compared with any subsequent age stage. The child turned into a small person from a completely helpless, inactive creature.

Now the baby copes with a whole range of physical and mental operations. He shows his character, passions, and inclinations. The child develops independence and an unquenchable desire for new knowledge and sensations.

“Remember that age holes and standards are just a guideline. Don’t try to fit your child into the statistics.”

12 Month Old Baby Health

If vaccinations by age have not yet been administered, they can be done in 1 year. The following third doses of vaccines are allowed: Hep B, Hib, and IPV. 4th dose of PCV13, MMR, VAR, and 2nd dose of HepA are given at this age. Do not stop taking vitamin D3. It is extremely important for the growth of bones of the skeleton, strengthening of joints, and growth of teeth.

Parents often complain about sleep disorders that are not associated with health. The baby may wake up due to abdominal pain in the teeth. The digestive system may react negatively when dairy products are introduced into the diet. There is flatulence, and abdominal cramps.

Sleeping Schedules at 12 Month

Sleep regression may disturb the child towards the end of the first year of life. It is not mandatory but is often associated with a crisis of 1 year. A jump in development or growth knocks down the usual and already fairly well-established sleep pattern. Getting your baby back on track and schedule is much easier than before.

In babies of 12 months, one long daytime sleep is most often established. It begins at lunchtime, dividing the periods of wakefulness into the first and second half of the day. The duration of activity increases to 4-5 hours. The norm of sleep per day is included in the redistribution of 12–14 hours. 2–2.5 hours are allotted for sleep during the day. Children sleep at least 8 hours a night with occasional awakenings.

12 Month Old Sleep

12 Month Old Sleep

The sleep schedule for a one-year-old child is conditional. It can be changed according to the needs of the family. The priority should always be the individual biorhythms of the baby. Try not to allow a strong discrepancy between your regimen and that of your child. Joint adaptation is the best way to the harmonious development of the child and the preservation of a favorable atmosphere in the family.

Change your sleep schedule based on morning awakening when regression appears. Always look for signs of fatigue and offer your baby to sleep right away. This should be done even if the rest is scheduled for a later time.

12 Month Old Feeding

It is very important to consider food tolerance when forming a child’s menu. Eliminate milk, gluten, and fruits from the diet if the child reacts badly to these products.

The diet of a one-year-old child should have 3 main meals and two additional ones. It is not recommended to remove breastfeeding or adapted formula yet. Ordinary nutrition will not satisfy the needs of the body. Energy costs during the period of the beginning of walking increase tenfold.

The basis of the diet is vegetables, fruits, cereals, meat, fish, and dairy products. Be sure to add unrefined vegetable oil to vegetable purees: olive, sunflower, linseed, etc. Add a little milk and butter to the cereals. All dishes should be of a fairly fine consistency. It is better to crush them with a fork and not grind them with a blender. Start allowing your child to eat slightly coarser foods.

12 Month Old Baby Movements

Most children at the 1-year-old walk without support according to statistics. They often fall but get up on their own and move on. Babies also get up without the help of nearby adults or objects.

A 12-month-old child sits down well and easily from any position, lies down, and quickly moves around the space. He begins to crawl less, preferring the vertical position of the body.

The baby is well coordinated with the movement of the hands. Loop-like movements are replaced by more precise ones with a direct approach to the subject. The kid prepares his hands for the correct grip, focusing on the size of the object. The work of all structures of the motion control system has been adjusted.

The application of previously learned movements in the game, imitation, or learning is practiced. The kid claps his hands, raising his hands, showing how he has grown, imitating that he is sleeping, laying his head on the pillow.

Safety Around Child

Dangers lie in wait for kids at every turn. The level of possible risks increases with the beginning of walking. The area of interaction of the child with space has expanded significantly and this increases the need for special attention and care. Unquenchable curiosity stimulates the baby to new research activities that are potentially dangerous.

Safety must extend to all places where a child is temporarily or permanently present. The baby can injure himself in any situation, even when it seems that everything is in order. The most relevant is a fall from a height, carelessness with water, and suffocation.

Children often receive chemical or thermal burns, injure themselves with sharp objects, and choke on fruits or foreign bodies. The most harmless thing that happens is constant abrasions due to falls while walking.

2 Month Old Sleep

Hallway -This place in the apartment or house is the favorite place for the baby to move. Try to remove shoes and excess furniture from his path. Remove the wires and keep the floor dry.

Tables – Remove all fragile, sharp, hot objects from the edges of the table. Move houseplants deeper or move them. Remove tablecloths if present. The kid can pull them from below and overturn everything.

Washing and dishwasherTurn on the button lock and child lock. Children love to press the glowing buttons. Check for electrical leakage and spilled water in the work area.

Bathroom – Line the bottom of your bathtub or shower with an anti-slip mat. A rubberized or fabric mat should also be on the floor in the bathroom. Slippery surfaces can lead to falls and head injuries.

Crib – Choose a crib with high sides and slats that your baby’s head won’t fit between. It is better to leave a special passage in the crib so that the baby can get out of it on his own and not climb over the top.

In public placesNever lose sight of a child on a holiday, playground, or street. Do not leave the baby to unfamiliar people of any gender and older children. Keep a stroller with a sleeping baby nearby.

What To Schedule Next

The child of 12 months is already quite developed. His needs for communication and forging new connections are increasing. Schedule educational activities for your child. It is better to give preference to interaction in a group of no more than 10 people.

Be sure to visit the pediatrician at 1 year old. He will give a final opinion on the success of the child’s development by 12 months. Control weighing and measurement will show whether there are serious deviations from the norm.

Schedule a visit with a podiatrist to check your feet and leg movement while walking. Schedule a visit to a gastroenterologist, dermatologist, and pediatric allergist if you have digestive problems or allergies to certain foods. Be sure to get any missed vaccines that are effective at this age.

Parents Tips and Development Speed Up

Do not use advice on your child that works on other children. Focus on the characteristics of the temperament of your child, his habits, and desires. Try to use only really useful and relevant information from trusted sources. Nobody knows your child better than you.

  • Toilet trainGradually remove the diapers, leaving them only at night. Encourage your child to go to the toilet after eating and before bed. You can teach to the toilet using special rims for children.
  • Feed in silence and aloneThe baby is often distracted, especially when breastfeeding. Give him quiet while eating. Do not accompany him with watching cartoons or listening to audio fairy tales. This is bad for digestion.
  • Do not buy unnecessary thingsThe baby now does not need a lot of clothes, shoes, or toys. A child grows out of everything and changes interests. Invest in books that develop flashcards and challenging toys that never lose their relevance.

Psychophysiological characteristics of a child’s development expand at 12 months: the constancy of perception of the shape of an object, verbal categorization of objects, and active visual study of the situation. There is a selective attitude towards others, an understanding of some generalized phrases, 10-15 words, and a clear intonational expressiveness. All this requires development support.

5 Development Speed Ups

  1. Variety of physical activity – Practice jumping, overcoming obstacles, ball games, and mazes.
  2. Development of fine motor skills Introduce plasticine modeling, kinetic sand, and finger painting.
  3. Formation of spatial thinking – Build simple and complex things from the constructor and use puzzles.
  4. Verbal communication – Voice actions, requests, and easy tasks. Talk about everything that’s going on.
  5. Reading by roles – Read fairy tales with intonation and imitate the voices of the characters

Parents should always take into account the dynamics of changes in the behavioral reactions of the child. Its functionality in providing contact with the external environment helps to develop cognitive processes.

The first year of life is especially distinguished by the effectiveness of achievements in the emotional, cognitive and physical spheres. The success of new “acquisitions” can be extremely low without the help of parents. The accumulation of individual experience is the result of the work of the infant after the visual perception of life in the family.

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