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General Practice 2023

Baby developmentê at 15 months: weight, sleep and nutritionção

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Baby developmentê at 15 months: weight, sleep and nutritionção
Baby developmentê at 15 months: weight, sleep and nutritionção

The 15-month-old is usually more curious and active, enjoying walking and playing with toys and with other children. At this stage, the baby also communicates better, recognizing his own name when called and speaking a few words, such as “tasa” (house) and “tato” (duck).

Baby feeding at 15 months should prioritize he althy foods, such as fruits and vegetables; cereals, pulses, proteins and tubers. In addition, it is also important to offer 1.3 liters of water a day to the baby, considering pure water, water from breast milk or infant formula, and water used in preparations such as soups and juices.

It is important to remember that development, speech, growth and sleep happen at different rates for each baby. Therefore, if there are doubts about the baby's development, it is advisable to consult a pediatrician.

Baby weight

The following table indicates the appropriate weight range of the baby for this age, as well as other important parameters such as height, head circumference and monthly weight gain, according to the World He alth Organization:




8.6 to 13.3 kg 7.9 to 12.9 kg


76 to 86.5 cm 74 to 85.2 cm

Head circumference

45, 9 to 49 cm 45.3 to 47.9 cm

Monthly weight gain

200 g 200 g

If the baby presents lower or higher values ​​of the indicated intervals, it is recommended to go through a consultation with a pediatrician to evaluate the child's development.

Baby development

A 15 month old baby is usually curious and learns many things by imitating what other people do. In addition, the baby at this stage is also very active, enjoying walking around the house, and playing with objects, toys and other children.

At this stage, the baby can already understand almost everything that is said to him, recognizes his own name when called, and speaks a few words, such as “mama”, “papa”, “tasa” (house) and “tact” (duck). In addition, the baby also knows how to communicate with his hands, saying "bye" and "hi", and signaling with his head, to say "no".

To help the baby's development, parents or guardians should talk to him throughout the day, during bathing and meals, for example. In addition, telling stories, playing games, showing pictures in books, dancing and singing songs are fun activities that are also important for the baby's development.

See other tips that can help your baby's development:

When to vaccinate the baby

According to the Brazilian Society of Pediatrics, a 15-month-old baby should have some vaccines, such as:

  • 4th dose of the OPV or VIP vaccine against poliomyelitis, or infantile paralysis;
  • 4th dose of the triple bacterial vaccine, which protects against diphtheria, tetanus and whooping cough;
  • 1st dose of the yellow fever vaccine, if the baby has not yet taken it;
  • Reinforcement of the chickenpox vaccine;

In addition, it is also recommended to boost the vaccine that protects against Haemophilus influenzae, a bacterium that can cause pneumonia, earache, sinusitis and meningitis.

Baby Feeding

At 15 months, the baby can already eat the same meals as the family, having to have 6 meals a day, including a portion of fresh fruit for breakfast, a morning snack and an afternoon snack, and 2 “s alty” meals” with fresh vegetables, cereals, tubers, pulses and proteins, for lunch and dinner, as explained below:

  • Breakfast: ½ serving of fresh fruit + breast milk, or 200 ml of whole cow's milk, or infant formula;
  • Morning snack: 1 serving of fresh fruit + breast milk, or 200 ml of whole cow's milk, or infant formula;
  • Lunch and dinner: 1 tablespoon of cereal, such as rice or pasta; or tubers such as yams and sweet potatoes + 2 tablespoons of vegetables such as chayote, tomato and spinach + 1 tablespoon of legumes such as black-eyed peas + 1 tablespoon of protein such as meat, fish or eggs + 1 piece small fruit;
  • Supper: breast milk, or 200 ml of cow's milk, or infant formula.

Whole cow's milk is recommended for 15-month-old babies who are not breastfed, as it is a drink rich in calcium, an important mineral for the formation of the child's bones and teeth. However, daily consumption should not exceed 600 ml, as milk can reduce the absorption of iron, an important mineral to prevent anemia.

In some situations, such as intolerance or allergy, consumption of cow's milk should be avoided at this age. Therefore, before offering this type of milk to the baby, it is recommended to talk to the pediatrician.

Industrialized foods, high in fat and sugar, such as ice cream, sausage, soda, ready-made sauces and pizza are not recommended for the baby. In addition, it is also not recommended to use s alt or sugar in meals, because the baby's taste is developing and the intake of these foods can favor a bad eating habit, causing obesity or other he alth problems during childhood or adolescence.

Water intake

It is important to offer around 1300 ml of water a day for a baby aged 15 months, including pure water, water from breast milk, or used in the preparation of infant formula, and water used in preparations such as soups and juices.

It is recommended to always offer filtered or boiled water to the baby, which should preferably be given in a glass or cup, distributed throughout the day and between meals.

Baby sleep

A baby at 15 months usually sleeps 9 to 10 hours a night and may still need to take 2 naps, with an average of 3 hours in total, during the day.

Sleep is an important time for the baby to learn to sleep alone, if he hasn't already, because it helps the child's autonomy, allowing him to feel safe and comfortable in his own bed and space.

However, if the baby has trouble falling asleep or sleeping alone, some measures, such as having a teddy bear, reducing the light in the room and noise in the house can help the child fall asleep. See other tips to help your baby sleep.

Games and activities

Plays and activities are fundamental, because they help in the development of communication, curiosity, confidence, creativity and the baby's well-being.

To have fun and help the baby's development, one option is to take him for a walk in a park or square, so he can walk, be barefoot on the grass or earth, see the trees, the flowers and listen to the birdsong.

Another activity option for 15-month-olds includes singing songs that encourage baby to learn about animal sounds or body parts, such as “head, shoulder, knee, and foot” for example.

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