Related Experiment Video

Updated: Feb 3, 2026

Ex Vivo Perfusion of the Rodent Placenta
06:54

Ex Vivo Perfusion of the Rodent Placenta

Published on: May 30, 2019

10.5K

Imaging of Placenta Accreta Spectrum

Eliza M Berkley1, Alfred Abuhamad

  • 1Eastern Virginia Medical School, Norfolk, Virginia.

Clinical Obstetrics and Gynecology
|October 20, 2018
PubMed

Placenta accreta spectrum (PAS) refers to an abnormally invasive implantation of the placenta into the uterine myometrium. The resultant risk is that of severe maternal hemorrhage and significant maternal morbidity and even mortality. The 2 strongest risk factors for the development of PAS are a history of a prior cesarean section and a placenta previa in the current pregnancy. Clinically, most patients are asymptomatic but some will present with vaginal bleeding and abdominal cramping. The goal of this article is to discuss the common clinical presentation and risk factors for placenta accreta spectrum, and to review in detail the ultrasound features/markers of PAS in each trimester.

More Related Videos

Isolation and Analysis of Hematopoietic Stem Cells from the Placenta14:42

Isolation and Analysis of Hematopoietic Stem Cells from the Placenta

Published on: June 24, 2008

21.1K
In vivo Bioluminescent Imaging of Mammary Tumors Using IVIS Spectrum08:53

In vivo Bioluminescent Imaging of Mammary Tumors Using IVIS Spectrum

Published on: April 29, 2009

47.9K

Related Concept Videos

The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
65.3K
The Electromagnetic Spectrum01:24

The Electromagnetic Spectrum

Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
33.7K
IR Spectrum01:19

IR Spectrum

When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
2.2K
Mass Spectrum01:23

Mass Spectrum

A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x-axis represents the ratio of the mass of the charged fragment to the number of charges it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal (the...
4.7K
UV–Vis Spectrum01:30

UV–Vis Spectrum

When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
2.1K
Autism Spectrum Disorder01:19

Autism Spectrum Disorder

Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
1.2K