8 Month Old Baby: Developmental Milestones

8 Month Old Baby: Developmental Milestones

This month, your little one will continue growing at a steady pace. The milestones for 8-month-old babies are ones that may surprise you. From their growth spurts to their motor skills, do not be surprised if you feel like the progress is happening overnight! To gauge the steady progress your eight-month-old will show in terms of physical and mental development, we have a handy chart for you. Many child growth charts may offer a broad overview of a child’s development. However, ours is one of the growth charts that will dive into physical milestones. These milestones include things such as weight and height. We have even detailed things such as head circumference, and other age-appropriate developments for you to look forward to. Let us take a quick look at what your baby will be doing this month.

8 Month Old Developmental Milestones Chart

Child’s Development Details Boys Girls
What is the weight of an 8-month-old? 15.43 to 23.14 pounds [1] 13.88 to 22.04 pounds [2]
What should the height of an 8-month-old be? 26.18 to 29.40 inches [1] 25.31 to 28.81inches [2]
How much should their head circumference be? 16.61 to 18.46 inches [1] 16.10 to 18.07 inches [2]
What is the respiratory rate of an 8-month old [3] 25 to 40 breaths per minute 25 to 40 breaths per minute
What is the heart rate of an 8-month-old [3] 80 to 120 beats per minute 80 to 120 beats per minute

What Are Some Physical Milestones For 8-Month-Old Babies?

Your eight-month-old develops a stronger bond of attachment towards you. This bond only strengthens as they grow. You can pick up on this easily. For example, you will notice that your baby will want to be held and cuddled all the time. And when you go to put them down, they may begin to cry the second they feel you loosen your grip on them. For babies who still take breast milk, this attachment can be especially strong. Not only that but your absence, even for a short while, will intensify the behavioral trait of separation anxiety. In addition to the immense bond that your little one has with you, there are some other development milestones that you should keep an eye out for. Here are some of the common behavior development milestones that you can expect from your 8-month-old.

Motor development

Your baby will surprise you this month by displaying a host of new motor skills. These motor skills will include things such as being able to grasp, scooting, and crawling [4, 5]. However, it is not uncommon for an infant to skip the crawling phase all together. In fact, many children will transition straight to walking [4]. Not only that, but with their tiny hands, strong grasp, and flexible leg muscles, your infant may even succeed in bringing himself to a standing posture with proper support [5]. Although few babies might start walking as early as this month, most children will instead focus their attention on beginning to use their hands. Some things they will improve upon at this age is their ability to grip and grasp things. [6]. Your child’s ability to use their hands, thumbs, and fingers for picking up and dropping things such as small circular objects will also improve drastically. [4,5].

Communicative development

One of the major milestones that your child will display at this age will show up in the way they communicate. The language of children at this age will develop language skill thanks to their babbles, squeals and coos. In addition to that, you will notice that their speech will appear more meaningful. In fact, words formed by combining vowel and consonants like “da-da” “and “ma-ma” might be aimed at you. Not only, that but at this age children will begin understanding the meaning of certain simple words like “bye-bye”, “mommy”, “daddy” and “milk” [4]. If they direct these words towards you, grasps your hands with theirs, or practice crawling towards you, it is probably all in an effort to communicate with you. Your baby continues to use a lot of nonverbal modes of communication such as growling, squealing, and grunting to express their pleasure or annoyance [26]. While these communication skills continue to develop over the month, be sure to celebrate them. Your little one being able to communicate with you is one of the major development milestones that you can most likely look forward to this month.

Another way in which your baby may try to communicate with you is through imitation. Your baby’s imitation skills also advance a step further in the sense that they are more inclined to try out a new trick they have just seen [7]. Lastly, children at this age have also developed a better capacity to understand. For example, your baby can respond to their name more efficiently when they hear it being called. While not always the case, your baby should acknowledge you when they hear their name. If they do not, then this could be a sign of a potential developmental delay. However, as with any developmental delay concerns, you should always bring any questions you have up next time you see your child’s primary care provider.

Child’s Psychological Development

One of the major milestones for 8-month-old children has to do with the way they understand the world around them. At this age, your infant will start to be aware of their surroundings. This means that they will be able to anticipate what the day will look like. For example, your child’s routine of wake and sleep patterns should be established by now. Your 8-month-old will be able to understand that it is time to sleep when put them into their crib. Along with that, the sight of a bottle reminds them of milk time. And with children who take breast milk, the mere sight of your chest will remind them it is time to eat as well. With breastfed babies, do not be surprised if your little one starts to reach out for your chest. In fact, one of the main development milestones of breastfed babies is their ability to grasp at their mothers’ breasts while they feed.

Sensory development

Your child’s sensory development really kicks off when they turn for 8 months. This is when their vision is nearly equal to that of an adult in terms of depth perception and clarity [5]. Though your baby still prefers close-ups, your baby can follow and identify people as well as objects across the room [8]. Along with seeing what they want, your baby now has an improved sense of hand-eye-brain coordination. Because of this, if your child sees their favorite toy lying in one corner of the room, crawling is something they will begin to practice more. If your baby still is not crawling, then this is a perfect time to practice crawling via tummy time. When doing tummy time, be sure to place an object that your child prefers in front of them. This will encourage them to begin crawling towards it. Lastly, as the brain and ear are coordinating well, they can perceive different sounds, becoming startled by unfamiliar ones like the whistling of a cooker or kettle, or the ringing of the doorbell [5].

Object Permanence

Another way your child’s development shines through is in the way they interact with objects. In this age group, your baby should be able to display traits such as throwing, banging, shaking, and dropping their playthings or small objects near him. All of this is a way that your infant can develop their skills as they explore the world around him. [5].

In addition to that, a major skill to look out for is the object permanence milestone. The concept of object permanence is something your baby should be fully displayed at this age. Object permanence is the idea that when something disappears, it is not gone forever. For example, children who are four months or younger will lose interest in small objects or toys if you take them away and hide them. If it is out of sight, it is as if it no longer exists. When a child reaches 8 months, they will have developed the understanding that just because the object is gone, it does not mean that it no longer exists. A baby who understands object permanence will often look around for small objects that were taken away or hidden. This is a concept that is usually easily seen in babies who still take breast milk. If you take the breast away and hide it, babies will still grasp at your shirt. This is because they know that the breast is not gone; just hidden away.

Solid and Fluid Intake: What Milestones Should You Aim For With Your 8-Month-Old

Knowing how much and when to feed your baby can be daunting. Here are some of the guidelines you should aim to follow when it comes to feeding your little one.

How Much Baby Food Should an 8 Month Old Eat?

When it comes to the feeding schedule of your 8-month-old, it really all depends on a couple of things. For many, babies in this age group will likely have begun experimenting with solids. Some great foods to play with when introducing solids include foods like mashed or pureed vegetables. Fruits such as cooked carrots, squash, sweet potatoes, potatoes, bananas, pears, peaches, and avocados are also great options as well. [4, 11]. The suitable table foods that may be added to your baby’s platter for breakfast or lunch include pieces of ripe banana, cooked potatoes, carrots or squash cut into pieces, small pieces of soft cheese, bits of bread or bagels (lightly toasted), and hard-boiled egg (chopped) [4,10,11]. Along with this, your baby is able to eat a variety of solid food as they develop an advanced pincer grasp reflex. Because of this, you can introduce your baby to finger foods if you have not yet done so yet [4]. Introducing solids at this stage will allow your child to gain the proper weight they need. This will also allow them to meet their proper growth spurt goals.

While you consider your baby’s diet, you will want to keep a couple of things in mind. For example, you will want to make sure you give your baby one type of food at a time. This will allow you to figure out if they are allergic to any types of foods early on. In addition to that, before introducing juice to your kid’s diet, do consult your healthcare provider [25]. Lastly, make sure to be by your baby’s side while giving them finger food [4]. If you feel they are developing an allergy to egg, meat, or any other newly added food, discontinue it immediately and bring it up with your doctor.

How Much Milk Should An 8-Month-Old Have?

Babies in this age group should still continue getting a healthy amount of breast milk or formula. Typically, your baby should be drinking anywhere from 24 – 32 ounces of breast milk or formula daily. This fluid intake is essential as it will allow your baby to maintain the essential nutrients that they need. Not only that but giving your baby the proper fluid intake will allow them to gain the appropriate amount of weight that many growth charts encourage you to aim for. Having a balanced intake of fluids and solids will serve them well once they begin hitting their growth spurts.  [4].

What is the sleep schedule of an 8-month-old

An eight-month-old will sleep for about thirteen to fourteen hours a day, including two naps that vary from about twenty minutes to an hour [4,12]. Sleep regression may be seen again in this month, causing them to experience disrupted sleep [13]. Make sure that your baby sleeps on their back instead of their stomach as the risk of SIDS (Sudden Infant Death Syndrome) remains high until the first year [14]. Allowing your baby to develop and maintain a proper sleep schedule will help them attain many of their physical milestones.

When to call a doctor

  • Having a fever, with a body temperature rising above 103 °F along with symptoms such as coughing, unwillingness to eat, an earache, diarrhea, vomiting, and fussy behavior [15].
  • Being severely constipated, losing weight, displaying a reduced appetite, and having blood in their stool [16].
  • Displaying sunken fontanel, abdominal pain, tearless crying, and less urination [17, 18].
  • Not being able to follow an object properly with one eye when the other is covered (it could be a symptom of a lazy eye) [19].
  • Being gassy paired with other symptoms such as increased crying, burping, flatulence, clenching of fists, and restless legs [21].
  • Vomiting that persists for more than twelve hours accompanied by rashes, fussiness, swollen abdomen, difficulty breathing, or presence of blood and bile (yellowish-green substance) in vomit [22].
  • Skin turning yellow, especially around the tummy, legs, arms, or sclera (white part of the eyes) paired with a lack of appetite and fever as it might indicate jaundice [28].
  • Showing symptoms of gastroesophageal reflux like spitting up more than normal after a feed, having frequent hiccups [28], coughing while eating, arching their back, and waking up from sleep screaming [24].
  • Having acne or small bumps on the cheeks, forehead, chin, and back for more than three months [27].
  • Appearing to be cross-eyed or having misaligned vision [20].

In this month, there are no immunizations, however, talk to your doctor if your baby has skipped any of the recommended past vaccinations.


  1. http://www.babycenter.in/a1052194/baby-boys-growth-chart-0-to-12-months
  2. http://www.babycenter.in/a1052197/baby-girls-growth-chart-0-to-12-months
  3. http://www.emedicinehealth.com/pediatric_vital_signs/article_em.htm
  4. http://www.webmd.com/parenting/baby/baby-development-8-month-old
  5. http://www.babycenter.com/0_your-8-month-olds-development-week-1_1477278.bc
  6. http://www.babycenter.com/0_your-childs-walking-timeline_10357004.bc
  7. http://www.babycentre.co.uk/a1047257/understanding-your-babys-cognitive-development
  8. http://www.babycenter.com/0_baby-sensory-development-sight_6508.bc?showAll=true
  9. http://www.babycenter.com/0_baby-sensory-development-hearing_6509.bc?showAll=true
  10. http://www.babycenter.com/finger-foods
  11. http://www.babycenter.com/0_age-by-age-guide-to-feeding-your-baby_1400680.bc?showAll=true
  12. http://kidshealth.org/parent/pregnancy_newborn/sleep/sleep812m.html
  13. http://www.babysleepsite.com/baby-sleep-patterns/8-9-10-month-old-baby-sleep-regression/
  14. http://www.babycenter.com/404_should-i-worry-if-my-baby-rolls-over-onto-his-tummy-while-as_3571.bc
  15. http://www.babycenter.com/0_fever-in-babies_84.bc
  16. http://www.babycenter.com/0_constipation-in-babies_79.bc
  17. http://www.babycentre.co.uk/a82/diarrhoea
  18. http://www.webmd.com/parenting/baby/baby-diarrhea-causes-treatment
  19. http://www.babycenter.com/0_strabismus-and-amblyopia_10890.bc
  20. http://kidshealth.org/parent/general/eyes/strabismus.html
  21. http://www.thebump.com/a/gas-pain-baby
  22. http://www.babycentre.co.uk/a536689/vomiting-whats-normal-and-whats-not
  23. http://www.parents.com/baby/health/baby-teeth/baby-teething-timeline/
  24. http://www.babycenter.com/0_reflux-and-gerd-in-babies_10900.bc
  25. http://www.babycentre.co.uk/x9141/should-i-give-my-baby-fruit-and-vegetable-juice-how-much
  26. http://www.parents.com/baby/development/talking/decoding-babys-sounds/
  27. http://www.babycenter.com/0_baby-acne_72.bc
  28. http://www.babycenter.com/404_is-it-normal-for-my-baby-to-get-hiccups-all-the-time_3652427.bc[/ref]