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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...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
Fetal Circulation01:14

Fetal Circulation

Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
Disorder of Water Balance01:29

Disorder of Water Balance

Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
Cardiovascular System Abnormal Findings II: Auscultation01:25

Cardiovascular System Abnormal Findings II: Auscultation

Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:

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Related Experiment Video

Updated: Jul 3, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
07:36

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

Published on: November 20, 2015

Amniotic fluid abnormalities.

Christopher R Harman1

  • 1Division of Maternal and Fetal Medicine, School of Medicine, University of Maryland Baltimore, Baltimore, MD 21201, USA. charman@umm.edu

Seminars in Perinatology
|July 26, 2008
PubMed
Summary
This summary is machine-generated.

Amniotic fluid analysis is crucial for fetal health, with ultrasound aiding surveillance. Interventions like amnioinfusion show promise for complications such as meconium aspiration during labor.

Related Experiment Videos

Last Updated: Jul 3, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
07:36

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

Published on: November 20, 2015

Area of Science:

  • Reproductive biology
  • Fetal medicine
  • Obstetrics

Background:

  • Amniotic fluid's complexity arises from fetal systems, maturation, and maternal factors.
  • Its volume and composition are vital indicators of fetal well-being.

Purpose of the Study:

  • To review the clinical role of amniotic fluid assessment and interventions.
  • To highlight research opportunities in amniotic fluid regulation and preterm delivery.

Main Methods:

  • Review of existing literature on amniotic fluid dynamics and clinical applications.
  • Analysis of evidence supporting ultrasound-based fetal surveillance.
  • Examination of controlled studies on amniotic fluid interventions.

Main Results:

  • Ultrasound, particularly the maximum vertical pocket method, is valuable for fetal surveillance.
  • Amnioinfusion may reduce cesarean deliveries for fetal distress and meconium aspiration during labor.
  • Controlled studies on amniotic fluid interventions are limited, except for intrapartum amnioinfusion.

Conclusions:

  • Amniotic fluid assessment is integral to fetal surveillance.
  • Further research is needed on amniotic fluid constituents and their link to preterm birth.
  • Intrapartum amnioinfusion shows potential benefits in specific obstetric scenarios.