When Do Babies Develop Fear? The Science Behind Infant Anxiety.

Babies are adorable and cute, but they can also be quite demanding. As soon as they’re born, they’re in the process of development. They have a lot to learn about the world, and one of the things they’ll need to learn is how to deal with fear. Understanding when and how babies develop fear can be important for parents and caregivers, so they can support their baby’s emotional and psychological growth. Let’s explore the science behind infant anxiety and find out when babies develop fear.

The Age When Babies First Develop Fear

As you may know, babies are born with a set of reflexes that help them survive. After birth, they start to develop awareness of the world around them. According to studies, the age when babies start to develop fear is around six months. At this age, they start to realize that they are separate individuals from their parents or caregivers. This newfound awareness can make them anxious, especially when they find themselves in unfamiliar or potentially harmful situations.

The Role of the Brain in Fear Development

When babies perceive a threat or danger, their amygdala, a small and almond-shaped brain structure, activates the “fight or flight” response, which is a natural and automatic physiological reaction to stress. The body releases adrenaline and cortisol, increasing the respiratory rate, heart rate, and blood pressure, preparing the body for action.

The regions of the brain responsible for emotional control, such as the prefrontal cortex, which allows us to regulate our emotions and behavior, are still under development at this stage, so babies rely mainly on their caregivers for safety and security. This is why it’s crucial that parents and caregivers are attuned to their baby’s needs, as babies require a safe and responsive environment to develop a sense of security.

Common Causes of Infant Anxiety

As babies become more aware of the world around them, they may develop anxiety in certain situations. Here are some common causes of infant anxiety:

  • Separation anxiety: Babies feel anxious when separated from their parents or caregivers, especially during the first few years of life.
  • Stranger anxiety: Babies may become anxious when encountering unfamiliar people or situations that they perceive as threatening or dangerous.
  • Fear of loud noises: Loud noises can startle babies and trigger the “fight or flight” response.
  • Environmental changes: Moving to a new house, changing caregivers, or going on a trip can trigger anxiety in babies, as they rely on consistency and routine to feel safe and secure.

How Can Parents Help Babies Overcome Fear?

Dealing with a fearful baby can be challenging for parents and caregivers. It’s essential to understand that fear is a normal part of infant development, and parents can do several things to help their baby feel safe and secure:

  • Offer comfort and reassurance: Babies need comfort and reassurance that they are safe and protected. Holding, cuddling, and soothing your baby when they’re anxious can help them feel more secure.
  • Create a safe environment: Babies feel safe when their environment is predictable and consistent. Creating a safe and secure environment with familiar sights, sounds, and routines can help reduce anxiety in babies.
  • Introduce new things slowly: Babies need time to adjust to new people and things. Introducing new stimuli slowly and gradually can help them feel more comfortable and less anxious.
  • Expose them to positive experiences: Babies learn by exploring their environment. Exposing them to positive experiences can help build positive associations and reduce anxiety.


Infant anxiety is a normal part of child development. Babies start to develop fear around six months, as they become more aware of the world around them. Understanding the causes and signs of infant anxiety, and knowing how to create a safe and secure environment for your baby is essential to support their emotional and psychological growth.

Frequently Asked Questions (FAQs)

  • Q: What are the typical signs of infant anxiety?
  • A: Common signs of infant anxiety include crying, clinging, trembling, sweating, and avoidance.
  • Q: How can I help my baby cope with separation anxiety?
  • A: Some ways to help babies cope with separation anxiety include establishing a predictable routine, providing comfort objects, and practicing short separations gradually.
  • Q: Is fear development the same for all babies?
  • A: Fear development may vary depending on a baby’s temperament, environment, and life experiences.
  • Q: Can babies feel fear before six months of age?
  • A: While it’s possible for babies to feel fear before six months of age, their fear response is not as developed as it is at six months.
  • Q: How long does infant anxiety last?
  • A: Infant anxiety may last for a few seconds to several minutes, depending on the situation and the baby’s temperament and coping mechanisms.


  • Birnholz, J. (1981). When Does Fetal Experience Begin? New England Journal of Medicine, 304(7), 448-451. doi: 10.1056/nejm198102123040705
  • Carlson, E. A. (1998). A prospective longitudinal study of attachment disorganization/disorientation. Child Development, 69(4), 1107–1128. https://doi.org/10.1111/j.1467-8624.1998.tb06163.x
  • McGraw, M. B. (1935). The development of human behavior. New York: McGraw-Hill.
  • Rothbart, M. K., & Bates, J. E. (2006). Handbook of Child Psychology, Vol. 3: Social, Emotional, and Personality Development, 6th edn. In: Eisenberg, N. (ed.), Socialization, Personality, and Social Development (pp. 99–166). New York: Wiley.

Leave a Reply

Your email address will not be published. Required fields are marked *