Three month old baby development

Babies change quickly, both physically and mentally. Therefore, knowing what to expect at each stage can not only help in the child’s development, but also favor interaction with the family. In this sense, 3-month-old babies live a very special moment.

In the first trimester of your baby’s life you can look back and see how much has changed since the moment he left the hospital, he is no longer that defenseless newborn who barely opened his eyes. Now, he is more active and attentive to the sounds around him, he is able to respond with smiles and follow you with his eyes. 

Although the little one has adapted to the outside world, he is still discovering all that the environment has to offer. This exploration phase is just beginning and will last all the years of the child’s early childhood.

Regarding the aspects of food, sleep and motor development, we delve a little more in the following sections.

Your height and weight

In the first trimester, the baby has gained an average of 200 grams per week, in the same way, he has grown about 10.5 cm. Without a doubt, the growth of the baby has been very fast, and it is no longer as small as in the first month. But, we cannot forget that, when it comes to the height and weight of a 3-month-old baby, this also depends on genetic factors. 

In addition, each baby grows at its own rate and the type of feeding can also affect its development and weight gain, so it is difficult to determine how much a 3-month-old baby weighs, as if it were a mathematical rule. Even so, pediatricians maintain standards that serve as a reference in terms of weight: for girls, a weight of 5.7 kg is estimated, while for boys the weight is 6.2 kg. We reiterate that these are reference figures. 

The same applies if you want to know how tall a 3-month-old baby is, as the baby’s development will depend on factors that also affect weight. But, in general, there is a table that averages the measurements of the 3-month-old baby as follows: 59 cm for girls and 61 cm for boys. 

Exclusive breastfeeding: the best food 

For your 3-month-old child, the most beneficial food is breast milk, for all the nutrients and antibodies it provides for the baby’s development. At this stage, breastfeeding should be maintained on demand , even when a decrease in feedings is observed or the time between one and the other is extended.

Do not think that this happens because your baby is not very hungry, on the contrary. The reason is that the baby spends more time with her environment, responds to external stimuli and can ignore, at times, that he is hungry.

For this reason, we emphasize the importance of maintaining breastfeeding on demand, as this favors adequate milk production. The free demand also applies in case your baby is fed with infant formulas. Although, in this case, it is advisable to maintain a period of 3 to 4 hours between each feeding, since the baby needs more time to digest these dairy products, due to the immaturity of his digestive system.

In any of these situations, we know that breastfeeding or feeding the baby on demand can be exhausting in the first months of life, so having one or more nursing pillows (here are some purchase options) can help to acquire a position comfortable for both you and the baby during feeding.

How long does a 3 month old baby sleep?

Studying the sleep patterns of infants , many researchers establish that the baby should sleep about 15 hours a day. Of which 5 hours are divided into daytime naps and the other 10 hours at night.

The utopia for many families is that these 10 hours are continuous, but the reality is different. During the night, the baby in this stage may wake up two to three times to eat, in some cases it can be more, since the baby wants to spend more time awake.

In this sense, it is necessary to maintain a routine from the baby’s first days to bedtime, such as a relaxing bath, a massage, change of clothes and diaper, eating, soft music, among others. The idea is to create a calm environment without stimuli so that the baby knows that bedtime is approaching, as well as to maintain this calm when she wakes up in the morning to eat. 

During the baby’s first year of life, many parents fear sudden infant death syndrome, which affects millions of children annually and occurs suddenly, with no apparent cause or previous pathology. However, some studies have shown that babies of parents who smoke have a higher risk of suffering a sudden death, as well as that some sleeping positions can contribute to gastro-esophageal reflux that triggers death in the infant, in addition to other factors such as pillows in the crib and excessive bedding. 

Consequently, sleeping near the baby is one of the measures that can be taken to constantly monitor the little one and be attentive to any incident, always trying to place him on his back or on his side at bedtime. 

changes in your brain

Earlier, we mentioned that babies of this age are already responding more quickly to stimuli in the environment, they can recognize their parents’ voices, and they know how to communicate through crying and sobs. Although these may seem like minor achievements, the development of a 3-month-old baby on a mental level is remarkable. She efficiently and very quickly adapts to the environment to ensure her survival, which she does through establishing strong social ties with her parents.

Perhaps, at this stage it is too early to think about buying toys for 3-month-old babies, since for the little one the main entertainment will be the mother or the main caregivers. 

By this we mean that to stimulate the 3-month-old baby you just have to be present and pay close attention to him, talk to him, tell him stories, sing him lullabies and talk to him with lots of love.

Massages after bathing and some physical exercises can also promote psychomotor development , while the baby learns to flex his limbs and be more aware of his body. 

Remember that in this stage of growth the baby needs to feel safe, loved and protected, do not let him cry until he falls asleep or spend more time awake during the day so that he sleeps through the night. All of these are baseless beliefs that do not respect the rhythms or needs of the baby.

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