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Doctor insights on: Infant Growth Chart Head Circumference

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What is normal head circumference for a 9mnth old?

What is normal head circumference for a 9mnth old?

Depends on gender ;: Velocity of growth. Has the head circumference grown normally along a single curve between 5th-95th%ile or increased too rapidly, e.g., jumping from 25th to 95th %ile (as may be seen in autism or hydrocephalus), or too slowly, e.g., dropping from 25th to 5th%ile, (indicating insufficient brain growth)?Girls' range at 9 months is 41.6-46.6 cm; avg. Is 44 cm. Boys, 43-47.4 cm; avg. Is 45.4 cm. ...Read more

Dr. Rodolfo Saca
28 doctors shared insights

Growth Chart (Definition)

A growth chart is used by pediatricians to follow a child's growth over time. Growth charts have been constructed by observing the growth of large numbers of normal children over time. The height, weight, and head circumference of a child can be compared to the expected parameters of children of the same age and sex to determine whether the ...Read more


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What does 90% percentile in infant head circumference mean?

What does 90% percentile in infant head circumference mean?

Relative study: His rating means that 10% of infants at this age have a larger head circumference (size) while 90% are smaller.If the size has increased from 25-50-75-90% over several months it would suggest growth was too rapid.If usually in that range, it just means the kid has a big head.It hasn't bothered me any, except for having trouble finding a helmet/hat that would fit.. ...Read more

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What is the average infants head circumference for a 5 month and 10 day girl?

What is the average infants head circumference for a 5 month and 10 day girl?

See answer : To a very specific question here is a very specific answer: average head circumference of a 5 month 10 days baby girl is 42cm or 16.5 inches. If u need more information or the normal range of head circumferences for any age group then u can look up under: cdc.gov/ growthcharts. ...Read more

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9.7 mnth old has a head circum. of 44cm,47.3% range on growth chart.Is this normal?She babbles,crawls,pulls self up.Not much change from 6mnth appt.

9.7 mnth old has a head circum. of 44cm,47.3% range on growth chart.Is this normal?She babbles,crawls,pulls self up.Not much change from 6mnth appt.

Missing information: Head circumference is normal, near average, but we need the velocity of its growth. Head growth slows normally after 6 mos., but should plot along or near the same growth curve it's always followed. Strings of babbling at 6 mos. become non-specific " da-da, ma-ma" in 9th mo. Gross motor is good. Screens are on firstsigns.org. Follow-up with pede. & MS Early Intervention Program if concerned. ...Read more

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I m concerned for baby head growth. She is 18 days old.Born with 37 CM head circumference today 40 cm.is that normal.

I m concerned for baby head growth. She is 18 days old.Born with 37 CM head circumference today 40 cm.is that normal.

Large head: 40 cm at 18 days is large. IF there is no bulging of the fontanelle, the difference may be due to molding durign the delivery. Was this a large baby? Is there a family history of large heads. If there is any concern, speak to your pediatrician andi f necessary have an ultrasound done. ...Read more

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My baby was born with a Head Circumference of 31.75 CM and at 3 month his HC is 36.9 cm. is the growth normal? Please advise and thanks a ton.

My baby was born with a Head Circumference of 31.75 CM and at 3 month his HC is 36.9 cm.  is the growth normal? Please advise and thanks a ton.

Speak to baby's doc: That is a rapid rate of growth in 3 months. The usual rate is 1 cm per month for the first 6 months. Was your baby small for gestational age? This condition can be associated with rapid "catch up growth" In some cases, familial macrocephaly accounts. Speak to your pediatrician and ask to see the head circumference chart, so you can understand what is happening. ...Read more

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2 month old has a ridge on saggital suture.Head circumference was in 1% at 1 month now it's 85% dr concerned? What is the reason for this rapid growth

2 month old has a ridge on saggital suture.Head circumference was in 1% at 1 month now it's 85% dr concerned? What is the reason for this rapid growth

Can be benign: This can be benign and normal growth or something more serious such as fluid accumulating within the brain, best to discuss with your doctor. ...Read more

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My 3 month old girl has a head circumference of 38.5 CM ..at birth she measured 34cms.m worried abt her low growth ..is she ok?

My 3 month old girl has a head circumference of 38.5 CM ..at birth she measured  34cms.m worried abt her low growth ..is she ok?

Within normal range: Both of these measurements are within the normal range and by themselves are not notable.Measurements of head circumference at this age is inconsistent from one observer to another. Head growth is better followed with serial measurements, done with the same technique and monitored over time. Two measurements will not establish a pattern while 3 or more likely give more information.Time will tell ...Read more

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My baby is 1 month old and her head circumference is 39cm should I be concerned?

My baby is 1 month old and her head circumference is 39cm should I be concerned?

So far, just enough: To have close monitoring by her pediatrician. That is in the above 90% range but checking for other sign and progress is the correct action to take. I hope everything else seems okay so that this can be explained and/or addressed easily. Don't worry - just have a good full exam done. Best wishes to you and yours! ...Read more

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