Health Guide

Growth Spurts in Infants: What Do They Mean and What Should Families Pay Attention To?

Dr. Elif SonayDr. Elif SonayApril 20, 2026
Growth Spurts in Infants: What Do They Mean and What Should Families Pay Attention To?

Babies change and develop rapidly during the first years of their lives from birth. Growth spurts, which are a part of this development, are natural periods during which babies make significant mental and physical progress in a short time. Almost every baby experiences these processes until the age of 2, but each child's experience with growth spurts may vary.

General Information About Growth Spurts

Growth spurts are periods when babies experience noticeable progress in their development during certain weeks, characterized by short but intense changes. These periods usually last 2 to 4 days and rarely extend up to a few weeks. Contrary to popular belief, growth spurts are not a sign of illness or discomfort; on the contrary, they are part of healthy development.

Most parents may observe sudden changes in the behaviors they are accustomed to in their babies during growth spurts. Disruption of sleep patterns, increase or decrease in appetite, restlessness, increased attachment to breastfeeding or withdrawal from breastfeeding, and intense crying are common symptoms during these periods. Although these changes can be concerning for parents, they usually subside on their own in a short time.

What Are the Main Symptoms of Growth Spurts?

The changes that can be observed in babies during a growth spurt may include:

  • Loss of appetite or sudden increase in appetite

  • Increased desire for closeness to mother or father

  • Wanting to breastfeed more frequently or refusing to breastfeed

  • Intense crying and restlessness

  • Difficulty falling asleep or disruption in sleep patterns

  • Fussiness and bouts of crying

  • Lack of interest in games or activities that normally attract attention

  • Digestive complaints such as high fever, diarrhea, or constipation (rarely)

  • Not wanting to be alone, increased dependency behaviors

Not all of these symptoms may appear in every baby. In addition, some babies may experience skin rashes or mild infection-like complaints. These symptoms are generally associated with growth spurts; however, if symptoms persist for a long time or are severe, it is important to consult a healthcare professional.

What Could Be the Causes of Growth Spurts?

The exact cause of growth spurts has not been scientifically determined. However, some possible causes related to the physical and mental development processes of babies are suggested:

  • Brain Development: The first two years are the period when the brain develops most rapidly. During this period, new connections are formed between nerve cells, and babies acquire various mental and physical skills.

  • Hormones: With growth spurts, the secretion of growth hormone and other developmental hormones may increase. This can trigger emotional changes.

  • Sleep Patterns: Maintaining sleep may become more difficult during a baby's growth. Some proteins secreted during sleep are thought to contribute to growth and brain development.

  • Nutrition: Inadequate and unbalanced nutrition of the baby may affect growth spurts. Appetite imbalances are common during spurt periods.

  • Environmental Changes: Life changes such as moving or the addition of a new family member may trigger stress-related growth spurt symptoms in some babies.

  • Individual Differences: Each child's genetic and environmental conditions are unique. Therefore, the duration, severity, and symptoms of growth spurts may vary.

Growth spurts are often an indicator of healthy development. However, parents can proceed safely by consulting their pediatricians in situations they find concerning.

During Which Periods Are Growth Spurts Observed?

Experts report that babies experience about 10 growth spurts in the first 20 months after birth. These spurts mostly occur during certain weeks. However, the timing may vary by a few days or weeks in each baby, and for babies born prematurely, the expected due date is considered in weekly calculations.

Periods When Growth Spurts Are Common:

  • 1st week: Sensory development begins. The baby starts to respond to the environment with sounds and facial expressions.

  • 5th week: Emotional awareness increases. Crying and restlessness may be observed in the baby.

  • 8th week: This is a reactive period. The baby responds to the parent's face and can follow objects.

  • 12th week: Imitation skills develop. The baby starts to imitate sounds and facial expressions, and there is progress in motor skills.

  • 19th week: Reaching for, holding, and grasping objects begins.

  • 26th week: Social communication skills strengthen; the baby may start to say 'mom' or 'dad', play games, and react to strangers.

  • 37th week: Physical mobility and balance develop; the baby tries to stand up and attempts first steps.

  • 46th week: Progress in language development, use of new words and simple sentences begins.

  • 55th week: Problem-solving skills develop; can cope with simple problems.

  • 64th and 75th weeks: Signs of independence and creativity increase; can do some tasks alone and shows imagination in games.

In children over two years old, growth spurts are usually intermittent and milder.

What Can Parents Do During Growth Spurts?

It is natural for changes to occur in your baby's daily routine during growth spurts. Being patient, understanding, and supportive during this period helps your baby get through the process more comfortably. Especially sleep and feeding patterns may change; therefore, it is important to be flexible and allocate time according to your baby's needs.

Some recommended approaches during this period:

  • Ensure your baby feels safe and let them know you are there for them.

  • Respond to loss of appetite or increased appetite with understanding; feed your baby appropriately without forcing.

  • Be flexible about changes in sleep patterns; be present during extra sleep or wakefulness.

  • If there is reluctance in breastfeeding or bottle feeding, try to remain calm and patient.

  • If you observe sudden or severe symptoms (such as high fever, prolonged vomiting, diarrhea, serious restlessness), be sure to consult a healthcare professional.

Staying in regular contact with your pediatrician for questions and medical advice about growth spurts is the healthiest approach.

Frequently Asked Questions

1. When do growth spurts usually occur in babies?

Growth spurts usually occur during certain weeks within the first 20 months after birth. However, the timing may differ slightly for each baby.

2. How long do symptoms such as restlessness or loss of appetite, which are signs of a growth spurt, last?

These symptoms usually last 2 to 4 days and most often subside on their own. If symptoms last long or are severe, a doctor should be consulted.

3. Are growth spurts a disease?

No, growth spurts are generally not a sign of illness. They are a natural part of healthy development.

4. What should I do if my baby is experiencing a growth spurt?

It is very important to be patient and understanding with your baby and to make them feel that you are there for them. If necessary, seek support from your pediatrician.

5. Do growth spurts occur in the same way in every baby?

No, growth spurts vary from baby to baby. The timing, symptoms, and duration may show individual differences.

6. Why is it important to understand the signs of a growth spurt in your baby?

Understanding the behavioral changes shown during these periods helps parents avoid anxiety and meet their babies' needs more easily, ensuring that babies continue their mental and physical development naturally.

7. If fever or rash develops during a growth spurt

what should I do?

Mild fever and rashes may be associated with growth spurts. However, it is recommended to consult a doctor in case of high fever, prolonged vomiting, diarrhea, or severe rash.

8. How are growth spurts calculated in premature babies?

In premature babies, the weeks of growth spurts are evaluated based on the expected due date, not the birth week.

9. Why are growth spurts important for a baby's development?

These periods are processes in which many mental and motor skills are acquired for the first time and intense brain and body development is observed.

10. What should I do if the breastfeeding pattern changes during a growth spurt?

Your baby may be reluctant to breastfeed or may want to breastfeed very frequently. Be patient, do not force, and if necessary, determine the appropriate approach by consulting your doctor.

11. How long do growth spurts last?

They usually last a few days, rarely a week or longer. If the condition persists and worsens, medical support should be sought.

12. What should I pay attention to in order to alleviate growth spurts?

Feed your baby without pressure, provide a safe and comfortable environment, and pay attention to changing sleep and emotional needs.

13. Do environmental changes affect growth spurts?

Yes, life changes and stress can trigger or affect the duration of growth spurts.

14. What developments can be observed in the baby after growth spurts?

New motor and social skills, increased environmental awareness, language development, and a desire for independent movement may be observed.

References

  • World Health Organization (WHO). “Infant and young child feeding: Model Chapter for textbooks for medical students and allied health professionals.”

  • Centers for Disease Control and Prevention (CDC). “Child Development: Infants (0-1 year).”

  • American Academy of Pediatrics (AAP). “Caring for Your Baby and Young Child: Birth to Age 5.”

  • Pediatrics (Peer-reviewed journal): “Patterns of growth and development in infants and young children.”

  • HealthyChildren.org, American Academy of Pediatrics.

Did you like this article?

Share with your friends