months of age

USAGE SUMMARY

The phrase 'months of age' is correct and usable in written English.
You can use this phrase when you need to indicate the age of something or someone, typically in its simplest form (rather than years, weeks, etc). For example, "The patient was 4 months of age when admitted to the hospital."

✓ Grammatically correct

Science

News & Media

Formal & Business

Encyclopedias

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Vaccine is not normally given until 2 months of age.

The New York Times - Health

Young become sexually mature at 9 10 months of age.

Encyclopedia Britannica

Before six months of age its results may be misleading.

Brazilian Journal of Otorhinolaryngology

Sexual behavior started from 5 months of age.

Animal Reproduction Science

Babies under six months of age are the most vulnerable.

BBC

A second evaluation was performed when foals were 12 months of age and a third evaluation when foals were 24 months of age.

Journal of Equine Veterinary Science

Plasma testosterone concentrations increased sharply from 3 to 6 months of age (P<0.05), after which there were no significant changes from 6 to 8 months of age.

Animal Reproduction Science

By 7 months of age, 45.2% of children had completed the recommended schedule, increasing to 49.5% and 81.2% at 13 and 18 months of age, respectively.

Vaccine

It is characterized by the appearance of superficial fibrillation by 12 months of age and severe cartilage lesions and eburnation by 18 months of age.

Osteoarthritis and Cartilage

Sexual maturity is reached at approximately 20 months of age.

Wikipedia

Juveniles are monomorphic until approximately six months of age.

Wikipedia

Expert writing Tips

Best practice

When writing for a general audience, clarify the age range (e.g., "babies under six months of age") to avoid ambiguity.

Common error

Avoid using "months of age" when describing the age of adults, as it's typically reserved for infants or young children. For adults, use "years old" or simply state their age.

Linguistic Context

The phrase "months of age" functions as a post-nominal modifier, specifying the age of a subject in months. It is typically used after a noun (e.g., "infant", "child", "puppy") to provide a precise age. Ludwig examples show its common use in medical, scientific, and general contexts.

Expression frequency: Very common

Frequent in

Science

60%

News & Media

15%

Formal & Business

10%

Less common in

Encyclopedias

5%

Wiki

5%

Reference

0%

Ludwig's WRAP-UP

The phrase "months of age" is a grammatically sound and frequently used term to specify the age of infants, young children, or animals. As Ludwig AI confirms, it's considered correct and usable in written English. With very common frequency, "months of age" is mainly used in scientific, news, formal and business contexts. While versatile, it's essential to avoid using it when referring to adults; "years old" is the more appropriate term in those cases. The phrase effectively communicates precise age, which makes it valuable in medicine, science, and general communication. When aiming for alternatives, consider "age in months" or "number of months old" for subtle variations.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

age in months

Reverses the word order for a slightly different emphasis.

number of months old

Replaces "of age" with "old" and specifies "number".

age expressed in months

More formal way to express the age in terms of months.

duration in months

Focuses on the duration rather than the age.

period of months

Specifies a period measured in months.

measured in months

Highlights that the measurement unit is months.

monthly age

Combines "monthly" and "age" to emphasize the monthly aspect.

at [number] months

A shorter, more direct way of stating the age.

within [number] months

Indicates a timeframe within a certain number of months.

spanning several months

Emphasizes a longer duration that extends over multiple months.

FAQs

How do I correctly use "months of age" in a sentence?

Use "months of age" to specify the age of infants, toddlers, or animals. For example, "The baby is three months of age." It's typically used when the age is less than two years.

What is an alternative to "months of age"?

Alternatives include "age in months", "number of months old", or simply stating "at X months old" depending on the context.

Is it appropriate to use "months of age" for adults?

No, it is generally not appropriate. The phrase "months of age" is typically used for infants, toddlers, and sometimes young animals. For adults, use "years old" or just state their age.

What's the difference between "months of age" and "years old"?

"Months of age" specifies the age in months, typically for young children or animals. "Years old" is used for older children, adolescents, and adults. For example, a baby might be "6 months of age", while a person is "25 years old".