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4 Month Old Baby: Development, Sleep and Milestones

The age periods of the child are widely studied. These are his life segments, which differ in morphological and functional features of growth and development. The characteristics of each period include an assessment of growth rates and psychomotor development, as well as the morpho-functional state of organs and systems.

A significant part of the studies of age periods is the features of care, health control, and the study of a complex of effective vaccinations. You should have all this information to remain conscious, attentive, and good parents. We will describe all the features of 4-month-old babies, possible problems, care, and safety rules in this article.

4 Month Baby Development

The baby becomes even more inquisitive at the age of four months. He looks at the world with great cognitive interest. His new physical skills and achievements in the development of skills help to replenish the reserves of sensations and impressions from the external environment.

The progressive development of a 4-month-old child improves his communicative abilities. There are many dynamic changes in the basic growth parameters of the baby.

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

An infant’s physical activity changes at 4 months. Hypertonicity decreases or completely disappears. Inborn reflexes disappear. All actions become more conscious, coordinated, and differentiated.

Improves the digestive system. Colic should be completely gone by 4 months. Especially if you were exclusively breastfeeding. The brain continues to develop and new neural connections appear. The mechanisms of the excretory system are being established, but the child will not control urination soon.

MusclesMuscle lengthening occurs. The back muscles are strengthened and coordination is improved. Strengthened neck muscles. Hypertonicity is slightly preserved in the lower extremities. Arms and hands become more controlled and their movements are coordinated.

EyesThe eye muscles become stronger and slight strabismus disappears. Visual reactions are enhanced and focus is improved. The centers responsible for the perception of color develop, they help to distinguish new shades. The work of the lacrimal glands is activated.

Organs of the gastrointestinal tractThe enzymatic system matures. Strengthens the neuromuscular apparatus of the intestine. The child begins to independently get rid of accumulated gases for the first time. This reduces colic. The color of the stool changes, becoming more familiar.

TeethTeeth are actively erupting inside the gums. This is not yet noticeable outwardly, but the baby begins to put everything in his mouth and chew. Increased salivation, which is provoked by the onset of teething.

CNSThe child is in the stage of generalized reflexes at 4 months. Active synaptogenesis occurs. The processes of information processing in the cerebral cortex become more complicated. The centers are responsible for the visual perception of an object mature.

Subcutaneous fat layerThe epidermis thickens. Subcutaneous fat grows, which is responsible for thermoregulatory processes. The baby begins to react less sensitively to temperature changes. The appearance of the baby is changing. It is noticeably rounded.

Your Baby Growth at 4 month

The size of a 4-month-old baby has increased by the generally accepted norms. Weight has increased by about 1.3 lbs compared to the past. About 2–3 cm have been added to the growth. Nobody canceled the individual genetic plan for development and growth. It is not necessary to standardize a living child under statistical norms.

The volume of the chest for girls of 4 months should be 39 cm. For boys – 40 cm. The head circumference of a four-month-old girl is 41 cm. The norm for this parameter for a boy is 42 cm.

4 Month Old Baby Milestones

The child reaches colossally progressive heights in psycho-emotional development by the age of 4 months. He gets used to certain rituals for care, the regime of the day and food. The kid begins to react to negative environmental factors with negative emotions.

The physical development of the baby grows. The musculoskeletal system gets stronger at 4 months. Reduced hypertonicity of the lower extremities. Strengthens the lumbar region. The child will soon begin to try to take a sitting position. Consider the main key points for assessing the level of development of the child that is characteristic of this age.

Vision The efficiency of synapses increases under the influence of visual stimuli and their functioning stabilizes. The color perception system is maturing (recognition of red-green shades). From 4 months, the ability to distinguish objects by size begins to appear.

The kid already uses the opportunity to distinguish between individual signs of an object during games. The child looks at the object and fixes it. The operations of processing information about the object fixed by the gaze are carried out.

Hearing The ability to localize sounds appears in infants from 4 months. Children perfectly locate the source of sound vibrations by turning their heads and directing their gaze toward the sound.

Children at this age are well distinguished by the mother's voice. They perfectly identify intonations. Children react to negative and aggressive tones by crying. Gentle and subtle intonations soothe them.

General movements and interactions with objects The main physical achievement for 4 months is a rollover from back to stomach and sometimes back. The kid begins to actively reach for objects, grab them with his palms, and feel. Movement coordination is enhanced.

The child is trying to crawl. For example, if various objects are laid out in front of him, he will try to reach them with his hands, helping with pushes of his legs.

Emotional reactions Toddlers at this age begin to be prone to emotional overexcitation. They overreact to such a stimulus of attention as a novelty.

This includes new people in the house, animals, and new bright or musical toys. The child may squeal loudly, laugh, or start too actively and continuously “gurgle” while talking to the object.

Communicative speech activity The baby begins to use speech as the main communication tool at 4 months. He doesn't say words yet, but he's already speaking syllables. Speech is formed based on the developing emotional-need sphere of the child in the process of communication with an adult.

A 4-month-old baby likes to repeat spoken sounds several times. This is a special kind of self-imitation and articulation practice. It is at 4 months that babbling appears.

Attachment Strong attachment to the mother awakens at 4 months. If earlier the child did not care who cares for him, now the baby begins to give preference to the mother. , The baby perfectly distinguishes his mother from all other adults with the recognition of her voice and the development of vision.

The baby can cry for a long time until he waits for his mother. He asks to be held, not calming down until his mother lifts him.

It can be concluded that by 4 months the main achievement of the child is the coordination of eye and hand movements and affection in the emotional sphere. The pinnacle of physical achievement conquered by a baby is coups. Mental – communication through the rudiments of speech.

The number of successful interactions with the outside world determines the effectiveness of a child’s development at this age. The greater the volume of communication, the faster the progress in development.

“Be sure to contact a specialist if you notice that the baby shows a weak emotional reaction to positive attention stimuli.”

4 Month Old Baby Health

Repeat doses of vaccinations should be administered according to the prescribed vaccination schedule of 4 months. This includes vaccinations against rotavirus, pertussis-diphtheria-tetanus, Haemophilus influenzae, pneumococcal (meningitis, pneumonia), and polio.

Parents sometimes first notice symptoms of plagiocephaly at 4 months of age. This is a deviation expressed in the wrong shape of the head. Also referred to the as flat head syndrome. The reason for this deviation is considered to be the incorrect positioning of the baby in the same position of the head.

There is a well-established opinion of experts that the tendency to plagiocephaly is due to a lack of vitamin D. This deficiency is detected in every fifth child. Treatment is required in rare cases. Vitamin D can be prescribed. This vitamin can be prescribed already from the first month of a baby’s life with a lack of sunny days.

Sleeping Schedules at 4 Month

The regimen in children is slightly normalized at 4 months. Mom gets used to the biorhythms of her child, adapting to flexible changes. Compliance with the daily regimen is an essential rule for caring for an infant. A four-month-old baby begins to be a little more awake, which changes his daily sleep norms.

You need 14.5-17 hours of sleep per night for a 4-month-old baby. Approximately 6 hours are allotted for daytime sleep. Night rest should not be less than 8 hours. Sleep at night is still accompanied by awakenings. Their number can be reduced to 1-2 per night. The daily sleep schedule is divided into 4 rests. One sleep will be longer (2 hours) and the other three will be shorter (40 minutes to 1.5 hours).

4 Month Old Sleep

4 Month Old Sleep

Connect all possible techniques to comply with the sleep schedule. These can be rituals before a night’s rest; soothing baths; keeping a dream diary; or positive physical activity. Don’t let your sleep patterns drift. A baby at this age is very prone to sleep disorders. They may be due to involvement in an interesting game, an increase in the duration of wakefulness, or an ongoing illness.

Maintain your daily sleep quotas by using compensatory short naps during the day. Do not wake the baby for feeding if he is fast asleep. Look for signs of fatigue and offer your child a rest right away.

4 Month Old Feeding

The introduction of complementary foods for 4 months is allowed in certain cases. Most often this happens when there is a lack of body weight, but the pediatrician may prescribe additional nutrition based on other considerations. For example, if a mother talks about the persistent food interest of the child.

You should not introduce complementary foods at this age if colic, problems with stool retention, and excess weight are still observed. It is better to start with complementary foods with vegetable purees of neutral flavors: squash, pumpkin, and broccoli.

The main product of the diet of a 4-month-old baby is breast milk. It can be its adaptive alternative – a mixture. You need to feed every 3.5 hours. The amount of milk the baby determines independently. The dosage for artificial feeding is determined strictly according to the rules indicated on the package.

4 Month Old Baby Movements

The child should confidently hold his head at 4 months in the prone position. The kid fixes his head well without support in a vertical position on his hands. The baby may hold the mother’s breast or hold the bottle while feeding. The child successfully rolls onto his stomach from a supine position. Sometimes it can make reverse coups.

The child rises high, leaning on his palms in a prone position. Makes attempts to crawl characteristically moving the body and striving forward. The movements of the arms and legs are accelerated by emotional arousal. They become more coordinated and clear.

Safety Around Child

The period of special attention for parents begins at 4 months. The baby begins to make its first active movements. He mastered the coups and improves these skills every day. Safety standards must be strengthened. The child at the moment can easily hurt himself.

The most relevant at this age is to ensure the safety of the child during the period when he is left alone for a short time. The baby can choke on small parts or parts of structures during contact with objects and toys. Be choosy in choosing educational toys for your baby.

Always remain vigilant and do not make elementary mistakes while maintaining safety. Your baby will not be able to take care of himself for a long time.

2 Month Old Sleep

In bedThe baby has started to roll over and he can practice it at night. Make sure the crib has safe, padded sides. Do not allow unnecessary items and bulky blankets in the bed in which the child can get confused.

In the play areaStir the baby on the floor for better development and safety by placing a special warm mat on him. This will eliminate the possibility of a fall. Make sure that there are no stairs, drafts, and pets nearby.

On the changing tableNever leave an infant unattended on a changing table. The baby will roll over and slide down. There is a risk of severe injury and more disastrous consequences. Take your baby with you if you need to go.

Outdoors – Use a comfortable stroller or sling for walking. Give your baby a safe place to sleep. Don’t over-wrap your baby. Assess the weather adequately. Walk in safe places away from highways.

In the carBe sure to fasten your baby in the car seat. Do not use the car seat if the harnesses are broken. Do not give your baby a bottle of formula while riding in a car. This can cause the child to choke.

In public placesKeep an eye on the stroller with your child and never let it out of your hands. Avoid large crowds. These places have a high viral load. Don’t let strangers be alone with your baby.

What To Schedule Next

It is recommended to pre-register for the 3rd dose of DTap (pertussis-diphtheria-tetanus) and PCV13 (pneumococcal) vaccines at 4 months. You should take care of enrolling in kindergarten. It is better to do this in advance to be sure that at the right time the child will be assigned to his age group.

Don’t forget your monthly checkup with your pediatrician. He will weigh the baby and measure the main growth parameters, entering them into your child’s card. Monitor your child’s body temperature if respiratory problems occur. Visit a virologist or infectious disease specialist if necessary.

Screening may be scheduled at this age. It includes a mandatory ultrasound of the internal organs and the brain of an infant. The state of the oval window in the heart and the work of the kidneys and pancreas are kept.

Parents Tips and Development Speed Up

There are new moments that must be taken into account in the care of an infant with each stage of growing up. All advice should come only from competent persons and trusted sources of information. What suits one child may not suit another at all. Don’t standardize your baby.

  • Practice new skills during the dayThe baby starts to roll over at 4 months. The kid will begin to train at night if it is not practiced during the day. This will seriously interfere with his sleep. There will be constant awakenings.
  • Do not rush to the call of the childChildren cry, and call their mother when there may not be a need for this. Wait 15 minutes when the child wakes up from sleep. Approach the child only when hysterical.
  • Do not create too ideal conditionsTry not to accustom your baby to perfect silence, to constant warmth and comfort. Make it adaptive. Health will be stronger and the baby will not grow up unable to survive in harsh conditions.

The main sources of information from the outside for the child are his parents. Their relationship always shapes the infant’s reaction to the hospitality or aggressiveness of the external environment. The baby grows and develops looking at you. The development of the child will slow down if limited only to care and feeding.

5 Development speed ups

  1. Fine motor skills training– Give the child objects of different textures in his hands and massage his fingers.
  2. Physical development – Do daily exercises and massages. Actively train rollovers.
  3. Development of speech skills – Speak your words. Sound the displayed items. Read poetry.
  4. Training of visual-orienting reactions – Demonstrate objects of various shapes and sizes. Zoom in and out on objects.
  5. Emotional communication Place accents in the tone of your voice when communicating. Smile at the child.

Do not make serious mistakes in communicating with your child. Its development and health are now entirely in your hands. Be calm and measured in your actions. Devote all your free time to taking care of your child. Be sure to rest during the baby’s sleep periods. This will restore your strength and give you inspiration for healthy communication with your baby.

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