font size

Definition of Infant, post-term

Infant, post-term: An overly mature baby that has not been born until well after the usual term pregnancy. A post-term baby is specifically one born 2 weeks (14 days) or more after the usual 9 months (280 days) of gestation. The gestation (length of the pregnancy) is calculated from the date of the last menstrual period (LMP). This is a very important calculation since, if delivery is delayed 3 weeks beyond term, the infant mortality rate skyrockets to 3 times normal.

The definition of a post-term infant has evolved. A few sources still consider a baby post-term if it is born a week after the usual 9 months' gestation but the current trend is to consider a baby post-term only if it is born 2 weeks (14 days) or more after the usual full-term 9 months of gestation.

The terms "post-term infant" and "postmature infant" are interchangeable.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=14522
Last Editorial Review: 6/14/2012

Drug Medical Dictionary of Terms by Letter

Top RxList Drug News

Parenting and Pregnancy

Get tips for baby and you.

advertisement
advertisement
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations