Amniotic sac

Template:Infobox Embryology

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

## Contents

* 1 Overview
* 2 Amniotomy
* 3 Diversity
* 4 Amniotic fluid
* 5 See also
* 6 References

## Overview

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The amniotic sac is the sac in which the fetus develops.

Some sources consider it to be equivalent to the amnion,[1][2], while other sources consider it to consist of the amnion and the chorion.

It is also called the amniotic bubble because of its resemblance to a bubble.

When in the light, the amniotic sac is shiny and very smooth, but too tough to pierce through.

## Amniotomy

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An artificial rupture of membranes (ARM), also known as an amniotomy, may be performed by a midwife or obstetrician. This is usually performed using an amnihook and is intended to induce or accelerate labour.

## Diversity

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The presence of the amnion identifies humans as amniotes, along with reptiles, dinosaurs, birds, and other mammals, but not amphibians.

## Amniotic fluid

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Amniotic fluid is the watery liquid surrounding and cushioning a growing fetus within the amnion. It allows the fetus to move freely without the walls of the uterus being too tight against its body. Buoyancy is also provided.

## See also

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* Caul

## References

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1. ↑ Template:EMedicineDictionary
2. ↑ Template:Dorlands

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