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7–9 mo

7–9 months

Babies sit on their own, crawl, and become wary of strangers. As they explore, hazards at home multiply quickly, so safety checks matter most.

Updated 2026-10

Key checklist for this stage

  • Get down at your baby's eye level and look around the house for hazards.
  • Increase solids to two or three times a day and gradually make textures coarser.
  • Check polio dose 3 (6–18 months) and the flu vaccine.
  • Plan to book the third infant health checkup (9–12 months in Korea).
  • Never step away from the baby during a bath, even for a moment.
  • Keep using the car seat rear-facing.

Development

By around 9 months, many babies sit without support. They start belly crawling or crawling on hands and knees, and some try to pull up on furniture. Some babies skip crawling and go straight to standing, so the style or order of crawling is not much to worry about.

They pass objects from hand to hand and try to pick up small things with thumb and finger. They turn when called by name and babble strings like 'mamama' and 'bababa'. They enjoy peekaboo and look for things that disappear from view.

Stranger anxiety and separation anxiety are signs that attachment is growing well. When leaving, a short goodbye is less confusing for the baby than slipping away unseen.

SEE A DOCTOR IFIf at 9 months the baby cannot sit even with support, does not respond to their name, does not babble, or rarely makes eye contact, discuss it at a checkup. If they lose skills they had, raise it right away.

Feeding

Increase solids to two or three meals a day and move from smooth purées to finely chopped or soft mashed food. Experiencing a range of textures now helps chewing and eating develop. Include iron- and protein-rich foods such as meat, eggs, and tofu every day.

Offer soft finger foods (well-cooked vegetable pieces, soft fruit), and you can start practicing small sips of water from a cup. Breast milk or formula is still an important source of nutrition alongside solids.

  • Choking hazards: do not give whole peanuts or nuts, whole grapes, whole cherry tomatoes, hard raw vegetables, rice cakes, or popcorn. Cut grapes and cherry tomatoes into small pieces.
  • Avoid honey and seasoned food (salt, sugar) before 12 months.
  • Always seat the baby to eat, with an adult watching.

Sleep

Naps usually drop to two a day. Even good sleepers may start waking often again because of separation anxiety or practicing crawling and standing. Keep a consistent bedtime routine, and when the baby wakes, soothe briefly in a quiet, dark room.

Keep the sleep space firm and flat, without pillows, blankets, or toys. Remove mobiles or toys over the crib once the baby starts pulling up.

Home safety check

  • Install safety gates at the top and bottom of stairs.
  • Anchor furniture that can tip over, such as dressers, TVs, and bookshelves, to the wall.
  • Cover outlets and keep cords and blind strings out of reach.
  • Store medicines, cleaning products, cosmetics, cigarettes, button batteries, and magnets up high and locked.
  • Keep hot pots, irons, and kettle cords where the baby cannot pull them.
  • Empty bathtubs, basins, and buckets right after use. Babies can slip under silently even in shallow water.
  • Do not place climbable furniture near windows.
SEE A DOCTOR IFCall 119 right away if the baby cannot breathe, cough, or make a sound (choking), has swallowed medicine or a cleaning product, or is floppy or vomiting after a fall from a height.

Health, vaccines, checkups

Few national vaccines are scheduled in this period, but if polio dose 3 (6–18 months) has not been given, schedule it, and during flu season check the flu vaccine. Missed vaccines can be checked on the KDCA immunization helper service.

In Korea, the third infant health checkup is at 9–12 months. It checks growth and development and gives advice on solids and preventing injuries. Babies who start daycare may catch colds and other infections often; most get better on their own, but see a doctor if breathing is hard or the baby is floppy.

Play and connection

  • Peekaboo and finding hidden toys teach that things still exist when out of sight.
  • When the baby points or makes a sound, name what they are interested in.
  • Play with stacking cups, balls, and pots and spoons: banging, putting in, and taking out.
  • Share a picture book every day, even briefly.
TIPA safe floor space where the baby can crawl freely is the best thing for physical development.

Vaccines & checkups in this stage

IPV (polio) · Dose 36–18 mo Influenza · Every year6 mo – age 13
  • General checkup 3 — Age 9–12 months

Korea's Childhood Vaccine Schedule →   Infant and Child Health Checkups →

FAQ

My baby is trying to stand without crawling first. Is that OK?

Crawling styles and order vary, and some babies stand without crawling. If the baby uses both arms and legs evenly and other development is on track, it is usually nothing to worry about. Ask at a checkup if you are unsure.

My baby's stranger anxiety is intense.

Stranger and separation anxiety are normal at this age. Let the baby warm up to new people slowly from your arms, and keep goodbyes short.

Which foods should be avoided in solids?

Before 12 months, avoid honey, choking hazards like whole nuts and whole grapes, rice cakes, popcorn, and seasoned food. Try foods you are worried about for allergy one at a time after talking with your pediatrician.

My baby slept well but now wakes at night again.

This is common with separation anxiety or new motor skills. Keep a consistent routine and soothe briefly. If the baby seems unwell, such as fever or fussing while touching the ears, see a doctor.

Sources

  • KDCA immunization helper service (Korea)
  • National Health Insurance Service infant health checkups (Korea)
  • Korean Pediatric Society
  • AAP HealthyChildren.org
  • CDC Learn the Signs. Act Early.

Medical information is for reference only. This is general information and does not replace diagnosis or treatment. Always talk to your child's doctor. In an emergency in Korea, call 119.

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