Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Fetal Circulation

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...

What are Membranes?

What are Membranes?

A cell's plasma membrane demarcates the cell's borders and determines the nature of its interaction with the environment. Cells exclude certain substances, take in others, and excrete some others in controlled quantities. The plasma membrane must be flexible to allow certain cells, such as red and white blood cells, to change their shape while passing through narrow capillaries. These are the more obvious plasma membrane functions. In addition, the plasma membrane's surface carries markers that...

What are Membranes?

What are Membranes?

A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and Golgi...

What are Membranes?

What are Membranes?

A cell's plasma membrane demarcates the cell's borders and determines the nature of its interaction with the environment. Cells exclude certain substances, take in others, and excrete some others in controlled quantities. The plasma membrane must be flexible to allow certain cells, such as red and white blood cells, to change their shape while passing through narrow capillaries. These are the more obvious plasma membrane functions. In addition, the plasma membrane's surface carries markers that...

Plasmodesmata

Plasmodesmata

The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.

Plasmodesmata

Plasmodesmata

In a multicellular organism, cells must communicate to work together in a coordinated manner. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
Intercellular junctions are a feature of fungal, plant, and animal cells. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal cells include tight junctions, gap junctions, and...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Cytomegalovirus Infection in Pregnancy: Neonatal Implications.

NeoReviews·2025

Same author

HIV in Pregnancy: Neonatal Implications.

NeoReviews·2025

Same author

Selective Fetal Reduction for an Anomaly in a Twin Gestation.

NeoReviews·2025

Same author

Myasthenia Gravis in Pregnancy and the Newborn.

NeoReviews·2024

Same author

Myasthenia Gravis in Pregnancy and the Newborn.

NeoReviews·2024

Same author

When the Placental Genetics Do Not Match: Confined Placental Mosaicism.

NeoReviews·2023

Same journal

Phototoxicity of brightfield live-cell imaging on murine ovarian follicles.

Archives of gynecology and obstetrics·2026

Same journal

First-trimester lipoprotein(a) and longitudinal renal biomarker trajectories preceding preeclampsia: a pilot cohort study.

Archives of gynecology and obstetrics·2026

Same journal

Correction: Intraoperative hemodynamics and anesthetic implications in superobese parturients undergoing cesarean delivery: a retrospective cohort analysis.

Archives of gynecology and obstetrics·2026

Same journal

Ophthalmic artery Doppler: reference values in low-risk pregnant women.

Archives of gynecology and obstetrics·2026

Same journal

Diagnostic and treatment delay in women with cancer in pregnancy: a case-based study.

Archives of gynecology and obstetrics·2026

Same journal

One-year outcome after laser treatment of vulvar lichen sclerosus: a prospective observational trial.

Archives of gynecology and obstetrics·2026

See all related articles

Search research articles

Related Experiment Video

Updated: May 13, 2026

Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue

Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue

Published on: June 6, 2016

Placenta membranacea.

Samadh F Ravangard, Kimberly Henderson, Kisti Fuller

Archives of Gynecology and Obstetrics

|March 8, 2013

Summary

This summary is machine-generated.

Placenta membranacea is a rare placental disorder where chorionic villi cover fetal membranes. This condition can cause significant vaginal bleeding during pregnancy, necessitating careful diagnosis and management.

More Related Videos

Ex Vivo Placental Explant Flow Culture - Mimicking the Dynamic Conditions In Utero

Ex Vivo Placental Explant Flow Culture - Mimicking the Dynamic Conditions In Utero

Published on: September 8, 2023

Related Experiment Videos

Last Updated: May 13, 2026

Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue

Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue

Published on: June 6, 2016

Ex Vivo Placental Explant Flow Culture - Mimicking the Dynamic Conditions In Utero

Ex Vivo Placental Explant Flow Culture - Mimicking the Dynamic Conditions In Utero

Published on: September 8, 2023

Area of Science:

Reproductive Medicine
Obstetrics
Pathology

Background:

Placenta membranacea is a rare placental anomaly.
It involves fetal membranes being covered by chorionic villi, either partially or completely.
This condition can lead to significant obstetric complications.

Observation:

A case of partial placenta membranacea is presented in a 35-year-old primigravida woman.
The patient presented with preterm labor at 24 weeks and 5 days gestation.
She developed heavy vaginal bleeding, leading to a classical cesarean delivery for suspected abruption.

Findings:

Postpartum placental examination revealed a small placenta with tan membranes and scattered cotyledons.
Histologic examination confirmed chorionic villi attached to the fetal membranes, consistent with partial placenta membranacea.
The case highlights the diagnostic features of this rare placental disorder.

Implications:

Placenta membranacea should be considered in the differential diagnosis of painless vaginal bleeding in the second and third trimesters.
This condition is associated with increased risks of other placental abnormalities like placenta previa and accreta.
Adverse perinatal outcomes, including stillbirth, preterm delivery, and neonatal death, are potential complications.