0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Viewpoint | ONLINE FIRST

Defining “Term” Pregnancy:  Recommendations From the Defining “Term” Pregnancy Workgroup

Catherine Y. Spong, MD
JAMA. 2013;309(23):2445-2446. doi:10.1001/jama.2013.6235.
Text Size: A A A
Published online

Extract

The national emphasis on reducing preterm birth, and the increase in scheduled deliveries, has created confusion around the definition of term gestation. The concept of “term” gestation provides guidance to clinicians and influences the public's perceptions about the optimal timing of delivery for a healthy pregnancy. Currently, a term birth is defined as a delivery that occurs neither preterm nor postterm. Because preterm is classically defined as delivery prior to 37 weeks following the onset of the last menstrual period and postterm as after 42 weeks, term has been conventionally defined as delivery between 37 and 42 weeks. The International Classification of Diseases defines term pregnancy as delivery between 37 weeks 0 days and 41 weeks 6 days.1,2

Figures in this Article

Topics

pregnancy

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

First Page Preview

View Large
First page PDF preview

Figures

Place holder to copy figure label and caption
Figure. Proposed Approach for Determination of Gestational Age
Graphic Jump Location

If the LMP is known, an ultrasound obtained before 13 weeks 6 days with a crown-rump length corresponding to a gestational age within 5 days confirms the estimated due date based on menstrual dates. Conversely, the estimated due date should be based on the ultrasound if the difference between menstrual and ultrasound dates is 6 days or greater. For ultrasounds between 16 and 22 weeks, composite gestational age based on biometry should be within 10 days to confirm LMP dating, and the estimated due date should be changed only if the calculated gestational age difference is 11 days or greater. If the LMP is unknown, dating should be based on ultrasound, preferably in the first trimester. When performed by trained practitioners, the first ultrasound is the most accurate, and the pregnancy should not be redated based on a subsequent ultrasound.aBiometry based on biparietal diameter, abdominal circumference, and femur length.

Tables

References

Letters

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Web of Science® Times Cited: 21

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

Customize your page view by dragging & repositioning the boxes below.

See Also...
Articles Related By Topic
Related Collections
PubMed Articles
Jobs
JAMAevidence.com

The Rational Clinical Examination
Make the Diagnosis: Early Pregnancy

The Rational Clinical Examination
Original Article: Is This Patient Pregnant?

brightcove.createExperiences();