There are days when an infant undergoes rapid developmental changes instead of gradual daily growth. You may notice a sudden increase in your baby’s height or weight without realizing it. In this article, we will explore what growth spurts are, their timing and symptoms in infants, along with a developmental milestones chart for physical and cognitive growth.

What Is a Growth Spurt in Infants?

A baby’s height and weight are the most visible indicators of growth. Typically, an infant’s weight doubles by around five months and triples by their first birthday. The head circumference also increases slightly, especially in the first four months. Growth spurts usually last from three days to a week, after which your baby returns to their normal state.

When Do Growth Spurts Occur in Infants and Children?

Babies generally lose about 10% of their birth weight within the first five days after birth, then regain it over the next five days. Once your newborn regains their birth weight, you may notice a rapid increase in size and a new growth spurt between three to six weeks.

It’s worth noting that growth spurts vary from one child to another and can occur at different times. If you have any questions or concerns about your baby’s development, it's best to consult a pediatrician.

Growth spurts become very rare after a child’s first birthday. During this stage, growth slows down and becomes more consistent between ages two and puberty. Typically, girls experience growth spurts between the ages of 8 and 13, while boys go through them between ages 10 and 15.

Growth Spurt Chart for Infants

You can track expected growth spurts in the first few months of your baby’s life by monitoring their physical and cognitive development. The following chart outlines these key stages.

Child’s Age Average Weight (kg) Average Height (cm) Child’s Development
First Month 3.4 – 5.7 51 The child listens to sounds and may respond to them.
Second Month 4.4 – 7.0 55 The child starts to interact and smile and can see colors more clearly.
Third Month 5.1 – 7.9 60 The child begins to reach out and touch whatever is in sight.
Fourth Month 5.6 – 8.6 65 The child can distinguish sizes, making it a good time to introduce toys.
Fifth Month 6.1 – 9.2 68 The child can sit with proper pillow support.
Sixth Month 6.4 – 9.7 70 The child can eat solid foods and may experience changes in eye color.
Seventh Month 6.7 – 10.2 71 The child begins the crawling stage and their teeth start to appear.
Eighth Month 7.0 – 10.5 72 The child expresses more about things they like and enters the crawling and support phase on walls and chairs.
Ninth Month 7.2 – 10.9 74 The child starts to understand some words and tries to step with their feet.
Tenth Month 7.5 – 11.2 75 The child’s language skills develop more.
Eleventh Month 7.4 – 11.5 76 The child can walk while holding onto objects.
One Year 7.8 – 11.8 78 The child can pronounce simple words and recognize shapes more clearly.

 

Symptoms of Growth Spurts in Infants

Increased Feeding Demand

During this phase, your baby may demand feeding more frequently, sometimes every hour or even every 30 minutes. Some mothers may worry about not producing enough milk, but don’t worry—your body naturally adjusts to the new demands within a few days. This can be considered the breast milk supply boost phase: the more you feed, the more your body produces to meet your baby’s increased appetite.

You’ll know your baby is getting enough if they are alert, content, and producing wet and dirty diapers. If you’re breastfeeding, it’s important not to supplement with formula during this time, as it may reduce your milk supply—exactly the opposite of what your baby needs! Older babies may also nurse more often or increase their intake of solid foods.

Sleep Disruptions

During growth spurts, your baby may wake frequently at night to feed or cry without an obvious reason. Growth spurts affect your baby’s emotions and increase their hunger, making them more clingy, moody, and uninterested in play.

Mood Swings

Just before a growth spurt, your baby may appear fussy or cry more than usual. Sometimes, this fussiness could be due to other issues like colic—especially if it occurs at the same time daily. It’s also possible that your milk supply hasn’t caught up yet, and your baby may get frustrated at the breast, crying for more milk immediately.

Sleeping More Than Usual

Studies show a link between sleep duration and growth in infants. Many mothers report that their babies sleep longer or more deeply, or take additional naps before, during, or right after a growth spurt. This makes sense—if a baby’s body is working hard to grow and produce growth hormones (which are released during sleep), then more sleep is essential for healthy development.

How to Handle Infant Growth Spurts

If you notice any of the growth spurt symptoms in your baby, try the following:

  • Provide extra milk or comfort if your baby seems hungrier than usual, asks for unexpected naps, or seeks more cuddles.
  • Help your baby get the sleep they need.
  • Be patient and try to soothe your baby calmly. 

Don’t be surprised if your baby seems to have gained weight or size overnight—it’s not your imagination! Growth spurts are a normal part of development during the first few months of life. If your baby appears hungrier or fussier than usual, just be patient and calm. These changes are temporary and will pass soon.

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