Development indicators of 3-month-old baby
Release time : 06/01/2025 09:30:02
What are the development indicators of a three-month-old baby? At 3 months old, the baby's posterior fontanel has closed, indicating that the cartilage has hardened into bone.
Babies will sleep longer continuously at night and will have a fixed nap habit during the day.
The baby's primitive reflexes begin to disappear and are replaced by spontaneous movements.
The baby's vision has also developed to the point where he can see everything within 1 meter.
Growth indicators Growth indicators 3-month-old baby The baby boy weighs 4.69-9.37kg and has a body length of 55.3-69.0cm.
The baby girl weighs 4.40-8.71kg and is 54.2-67.5cm long.
Ability indicator When the baby is prone, it will not only lift his head, but also lift it very high.
Body appearance and growth: This period is the time when the baby's physical development is fastest. His weight increases by about 1 kilogram per month and his height increases by about 4 centimeters per month.
Head circumference will increase by approximately 1.25 centimeters.
At 2 months, the fontanelle is still open and flat. The child looks a little roundish but as he begins to use his hands and feet more actively, muscle growth starts and fat disappears.
At three months, the body length has increased by about 1/4 of its birth length and the weight has increased by a factor of two compared with the birth. For male infants, the weights range from 4.1 to 7.7 kilograms and the body lengths from 55.8 to 66.4 centimeters.
The female infant weighs between 3.9 and 7.0 kilograms, and measures between 54.6 to 64.5 centimeters in height.
Exercise: Within this month, the Moro reflex and heel-toe reflex will gradually disappear.
Most of the reflexes that children had before will reach their peak and begin to disappear in 2-3 months.
After the reflex disappears, he may temporarily lack activity, but his movements will be more finely regulated and purposeful, steadily developing towards maturity.
By the end of the month, he could even kick himself in the butt from front to back.
She will look at her small hands, hold them together and play with them in front of her.
At this point, his hand-eye coordination was off, and he appeared clumsy, often failing to reach the toys.
The development of hand movements is also known as fine motor skills, and it typically begins around this time when the grasping reflex disappears. This marks the onset of conscious hand movements.
3-month-old baby development nutrition diet: 3-month-old babies are mainly fed with breast milk or formula.
After giving birth and having recovered most of my strength, I still need to pay attention to my diet.
There are certain foods that should be avoided or consumed in moderation.
For example, barley malt, malt essence, maltose, etc. that have the effect of milk recovery.
The baby is getting stronger and stronger at this stage. Have you found that he has changed a lot since when he was born? These are all the results of your hard work in raising them. Now you need better nutrition, enough milk, and let your baby eat more happily, so that he will grow faster! 1. Ingredients for bacon and rice: 600 grams of millet, 150 grams of bacon (raw), 35 grams of rapeseed core.
Practice: Wash the millet, wash the rapeseed into grains, and cut the bacon into small grains.
Pour appropriate amount of water into the pan and boil it, add millet, bacon grains, shredded rapeseed, and salt, boil it again, use low heat to simmer and serve.
2. Breast milk is still the best food for your baby for three months, because it not only provides the baby with rich and easy to digest and absorb nutrients, but also contains a large number of immune factors, which can help the baby resist the attack of diseases.
If you cannot breastfeed your baby for reasons related to work or health, formula milk that is similar to breast milk should be fed instead of foods like rice soup, rice porridge or baby food that are difficult for the baby to digest and absorb.
In terms of cognitive development, hearing and speech: The infant's auditory skills are also developing rapidly, with the ability to discern directional cues. Upon hearing a sound, the head can rotate 180 degrees in response to the direction of the sound.
There has also been a development in language skills, with a cheerful giggle when he's being tickled and a sweet smile appearing on his face when he sees his mother. He continues to make sounds, uttering more words and beginning to produce distinct vowels, such as "ah," "oh," "u," etc., as if sharing heartfelt thoughts with his mother.
Face to face with your baby, make him watch your mouth shape, repeat the sound and let him imitate.
Parents should use voices and toys to attract the baby to look around in different directions, whether they are lying down or being held.
It is also advisable to frequently play music that is beautiful and soothing, but not overly prolonged.
When babies are making noises, parents should listen attentively and respond as if they were talking to the baby.
Parents can use different tones and voices when talking to babies, such as a gentle and affectionate voice, a commanding voice, or an excited shouting voice. This helps the baby distinguish different tones and respond accordingly, promoting his ability to perceive language.
Visual: At this time, the child's vision undergoes dramatic changes. The eyes become more coordinated, allowing both eyes to move simultaneously and focus at the same time.
At such a young age, they already know how to use a bottle. The moment an adult holds it, they understand and eagerly await their food or water.
Place a brightly colored, preferably pure red, green, and blue toy, such as a ring, bell or ball, at a distance of 20-30 centimeters above the baby's bed.
Toy the baby in front of the baby, to touch or shake it to arouse his interest.
After the baby fixates, move the toy side to side (180 degrees horizontally and 90 degrees vertically) so that the baby's gaze follows the direction of movement.
Emotional and social development: By the end of 3 months, the child may have learned to talk with a "smile". Sometimes he will talk with you in a conversational manner by smiling at you and laugh to attract your attention.
Other times, he would lie there waiting, observing your reaction until you began to smile, and then he would respond with a joyful smile.
His whole body will be involved in this conversation, his hands open, one or two arms raised, and the upper and lower limbs can move rhythmically with your tone of voice.
He imitates your facial movements. When you speak, he opens his mouth and looks around, and when you extend your tongue, he does the same.
How to care for a 3-month-old baby: 1. How to help your baby roll over: Rolling over is the first way a baby moves. Babies often lie on their tummies with one side facing outward.
At this point, the baby may have developed a consciousness of turning over. However, it might not yet grasp the basic principles of the turn-over movement, or the direction might be difficult for him to turn over in.
At this time, the mother can gently hold the baby's arm, pull him sideways, and teach him to rotate his waist and buttocks.
You can also try calling him in the other direction, teasing him with toys, and letting him find the direction where he can easily turn around.
2. What should I do if my baby has a cold? Because the baby's immune system is not yet mature, it is more likely to catch a cold.
Don't take the liberty of giving him antibiotics at will, which may lead to drug resistance or allergies.
Antibiotics must be taken under the guidance of a doctor to be safe.
3. Fever: Your baby's body temperature is prone to fluctuations, and many factors such as infection and exercise will change your baby's body temperature.
If your baby's fever is below 38.5℃, it is recommended to use only physical cooling methods. If it is above 38.5℃, you'd better give him antipyretics in time or send him to hospital for treatment.
4. Whooping cough: In infants with whooping cough, there is a paroxysmal spasmodic cough and a barking inhalation sound.
You must keep the baby isolated, ensure ventilation in the home, but do not let the baby catch cold. Adjust the diet, eat dry and soft food easily digested, and timely expectorate.
5. Bathing Baby: You might think, "Just washing the baby with water is enough to clean the skin, so there's no need to use shampoo.
However, clean water is not as gentle as imagined. Many areas in China are hard water regions, and bathing with hard water can easily irritate baby skin, leading to dryness, eczema, and other skin issues.
Therefore, when bathing a baby, it is advisable to choose mild and gentle products that closely resemble the baby's natural skin pH. Some shampoos and body washes can neutralize water metal ions, soften the water quality, and gently clean oil-soluble dirt.
And can effectively remove dirt while protecting the natural balance of baby's skin, which is not possible with plain water cleaning.
6. Vaccination: Remember to administer the Poliomyelitis vaccine (second dose) and the DTaP vaccine (first shot) this month for your baby.
The whole process of baby development in 3 months When the doctor cuts the umbilical cord for your baby, handles it properly, holds him or her and lies on your naked and warm chest, and touches your skin, have you temporarily forgotten the long and painful childbirth process you have just experienced?
Will that wonderful feeling be unforgettable for the rest of your life: joy, surprise, love, dreamlike and other emotions intertwined, and a bit unfamiliar and a bit overwhelmed?
The experience of being a mother becomes real and three-dimensional, because the baby connected to you by blood is right in front of your eyes and in your arms, within reach.
The two-week baby is continuing to work hard to adapt to this new environment. For him, the outside world is noisy and bright compared with his mother's womb, which makes him a little uncomfortable.
But you will find that the baby is improving every day and his adaptability is quite strong.
Most of the baby's weight will temporarily drop during the first week of life. This is because the baby has less milk at this time, coupled with the discharge of meconium and urine, as well as skin sweating and breathing, which will cause a part of the body's water to be lost. Temporary weight loss will occur 2 to 4 days after birth. Medically called "physiological weight loss", the decline generally does not exceed 300 grams.
As the intake of milk increases, the baby's weight starts to rise on the 4th and 5th days, and it can return to the birth weight within this week.
You will find that the movements of your baby's limbs are involuntary and unconscious conditioned reflexes. For example, when startled by a loud sound, your limbs will subconsciously hug towards your chest. This is the unique hug reflex of newborns.
By the end of this month, you will notice that as baby's muscle control develops, their movements become intentional.
From birth to 56 days, babies still have a magical ability - the walking reflex. Starting from the 8th day of their birth, this innate ability can be utilized for training. This not only enables babies to learn to walk early on but also promotes the development and maturation of their brains and intelligence.
Some babies make a sound when breathing, which may be caused by the cotton fibers that come off their blankets and clothes, as well as more dust in the air, blocking their nasal passages and upper respiratory tract. However, there is no need to worry; this does not mean the baby has caught a cold; it's just that the baby is trying to breathe.
You can try to use a cotton swab with baby oil, help the baby clear the dirt in the nose, but the action must be gentle, careful to hold the baby's head and not let him shake.
At 3 weeks, the baby has established various conditioned reflexes. When you separate his or her tight hand and touch the palm of his or her hand with a finger, he or she will hold your finger tightly and not let go; When the mother holds him or her on her chest and is ready to feed, or when the baby cries because of hunger, he or she will shake his head left and right, open his mouth, and arch to find his mother's nipple; He (she) can already master the essentials of breast suction very skillfully, sucking very forcefully with her small mouth; when you slowly put your hand closer to your baby's eyes, the baby will involuntarily blink his eyes when you reach a certain distance.
Now the baby can look at you in return, but the duration is not long.
When your baby looks at you, you should also be attentive and gaze into his or her eyes, offer a loving smile, nod to them gently, and call out their nickname. All of these actions can make your baby feel happy.
The baby has not yet the ability to consciously touch objects, but he (she) like your massage, and you have his (her) affectionate touch, gentle voice, and kind smile.
At this stage, the baby's body is still soft, and when carrying him or her, it is important to ensure that the baby's neck and hips are well supported.
If your baby frequently cries and becomes irritable without any apparent cause, and no matter how you comfort them, they will not calm down, with episodes of intermittent crying that last for several minutes before they can settle down, it is possible that the baby has colic.
Generally speaking, about 20% of babies start to have symptoms of colic from 2 to 4 weeks after birth. During the attack, the baby will cry for a long time and look uncomfortable.
If your baby exhibits this phenomenon, you may find the next few months quite challenging, as the abdominal pain is functional and often recurrent, with no particularly effective treatment methods available. The condition will likely resolve naturally as the baby grows older.
When the seizures occur, it is important to have the baby in a prone position and gently massage the back of the baby to help relieve pain.
It is also permissible to administer pediatric sedatives, as advised by the doctor.
At this stage, the baby has already begun to show various personality traits, with some being easily irritable and demanding attention, exhausting mothers; others are calm and obedient, requiring minimal care. This is determined by the baby's different neurotic types and temperament types, and it is only possible to adapt to the baby rather than easily change them.
This is going to test the patience of both parents.
Every baby is a unique individual, and it's important to respect their individuality and allow them to grow up happy and healthy.
The baby has now been three weeks old, and by this weekend, it will be a full month! The birth of the baby seems like just yesterday, yet for mothers, the past month has been incredibly long, filled with the challenges and sweetness of being a new mother. However, witnessing the baby's daily progress fills mothers with joy even when they feel exhausted and burdened.
Now the baby's neck strength has increased, he can lie on his back in bed or on the chest of an adult, support his head with his belly and lift his head a little bit, and also can turn his head to the left and right.
If you hold your baby up or sit on your back, the baby's head can be held up for a short while, but not for too long to avoid fatigue.
The baby's movements of the arms and legs have become more coordinated, suggesting that his or her ability to control muscles has improved.
Now the baby has initially formed his own sleeping, nursing and defecation rules and habits, and some babies can sleep for 4 to 6 hours at night. However, there are great differences between babies. Some babies still need their mother to feed milk 2 or 3 times at night.
In particular, breastfed babies have short intervals between breastfed milk. Because breast milk is easier to digest, babies who eat breastfed also have more bowel movements than babies who eat milk and need more care from their mothers.
At this time, the baby can already distinguish its mother's voice and smell. Even if the mother is not in front of it, as long as it hears its mother's voice, the baby will show excitement; if the baby is crying because of loneliness and boredom, the baby hears its mother's voice, It will also calm down quickly.
If you have given prenatal education to your baby, try playing music or stories that you often listened to during the fetus. The baby is likely to have a significant reaction.
Now, the baby can determine the source of the sound. When hearing sounds coming from different directions, the baby's head will turn in this direction.
But the distance of the sound should not be too far, it should be within 50 centimeters.
The baby's eyes can now see people and objects at close range, and his eyes will follow the objects in front of him horizontally. He especially likes to see pictures with thick lines, simple patterns, and bright colors, especially the patterns of human faces.
Compared with the previous few weeks, the baby has made significant progress and looks more likable.
The average weight of a full-moon baby is 4.9 kg for boys and 4.6 kg for girls; the average length of a full-moon baby is 56.6 cm for boys and 55.6 cm for girls.
The unique characteristics of newborns at 5 weeks of age, such as being prone to startle and unstable movements of limbs, began to gradually disappear in the baby after a full month.
His or her limbs and small hands are much more stretched out than when he was born, but he still curled his limbs like a little frog when he sleeps, a position that will last for a long time.
The baby has become accustomed to various sounds from the outside world and has begun to distinguish the source.
He (she) can stare at you attentively and smile at you when he is happy. At this time, the baby won't laugh out loud, but you can already tell that he is smiling at you.
Now, the baby can lift his head when lying on the bed. Some babies 'heads and necks can already be erected, but don't let the baby lie down for too long. If you lie down for a while or stand up for a while, you have to lie down and rest.
Now, when you hold a toy in front of a baby and move it around, the baby's gaze can follow the moving object.
However, what the parents were most thrilled about was that their baby had begun to "speak". At this point, babies would emit sounds such as "mhm", "aaa", "eee", and "yaya" to express their emotions and needs. At this moment, it is essential for the mother to respond to her baby promptly. She can mimic the baby’s sounds and engage in conversation with her, as much as possible. Even if she leaves for a while or goes into another room, she should continue talking to the baby, ensuring that the baby hears her voice. This way, the baby's mood will become significantly more peaceful.
Currently, parents' lives are filled with constant baby changes-changing diapers and feedings, attending to their mouths and butts, leaving little time for themselves. This exhausting routine not only wears them down but also makes them feel stagnant and gloomy. More seriously, some mothers suffer from "postpartum depression," requiring medical intervention and the support of family members.
Don't rush; this is just a phase of parenting life, not the entire future. As your baby grows day by day, you will see that your hard work has paid off with your child's healthy growth, and you will cherish your baby even more for it.
*The medical information provided in this text is for reference only.
If you experience discomfort, it is advised to seek medical attention immediately. The diagnosis and treatment should be based on the examinations conducted in person by a medical professional.