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Related Concept Videos

Ovarian Cycle01:27

Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...
Teratogenicity01:07

Teratogenicity

The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
Proliferative Phase01:20

Proliferative Phase

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Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...
Truncation in Survival Analysis01:09

Truncation in Survival Analysis

Truncation in survival analysis refers to the exclusion of individuals or events from the dataset based on specific criteria related to the time of the event. This exclusion can happen in two primary forms: left truncation and right truncation.
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Secretory Phase

The secretory phase of the menstrual cycle, spanning from day 14 to 28 in a typical 28-day cycle, is a period of significant physiological changes in the female reproductive system. This phase commences immediately after ovulation and is characterized by the preparation of the endometrium for potential embryo implantation.
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Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer
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Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer

Published on: January 7, 2014

Term pregnancy: time for a redefinition.

Steven L Clark1, Alan R Fleischman

  • 1Women's and Children's Clinical Services Group, Hospital Corporation of America, Twin Bridges, MT 59754, USA. steven.clark1@hcahealthcare.com

Clinics in Perinatology
|September 6, 2011
PubMed
Summary
This summary is machine-generated.

Term pregnancy definitions impact clinical management. Recent data reevaluates neonatal morbidity within the traditional term gestation period, highlighting risks previously overlooked.

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Last Updated: May 29, 2026

Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer
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Published on: January 7, 2014

A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse
07:04

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Published on: October 24, 2017

Area of Science:

  • Obstetrics and Gynecology
  • Neonatal Medicine
  • Perinatal Health

Background:

  • Clinical management of pregnancy complications relies on accurate gestational age definitions.
  • Preterm birth and postterm pregnancy are known risk factors for neonatal morbidity.
  • Limited attention has been given to differential neonatal morbidity within the conventionally defined term gestation interval.

Purpose of the Study:

  • To reevaluate the concept of "term pregnancy" based on current data.
  • To analyze the differential morbidity of neonates born at various times within the traditional term gestation period.
  • To inform clinical practice regarding optimal timing of delivery and management of pregnancy complications.

Main Methods:

  • Review and analysis of current epidemiological and clinical data on neonatal outcomes.
  • Comparison of morbidity rates for neonates across the 5-week "term gestation" interval.
  • Reassessment of established definitions of preterm, term, and postterm pregnancy.

Main Results:

  • Neonatal morbidity varies significantly within the conventionally defined "term pregnancy" window.
  • Specific gestational age ranges within term gestation present distinct risks for neonates.
  • Current definitions may not adequately capture the nuanced risks associated with "term" births.

Conclusions:

  • The traditional concept of "term pregnancy" requires reevaluation.
  • Gestational age within the term interval has significant implications for neonatal outcomes.
  • Clinical management strategies should consider the differential risks associated with specific "term" birth timing.