Amniotic sac

Template:Infobox Embryology

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

Overview[edit | edit source]

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[edit | edit source]

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[edit | edit source]

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

Amniotic fluid[edit | edit source]

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[edit | edit source]

• Caul

References[edit | edit source]

Template:Embryology

de:Fruchtblase io:Amniala sako it:Amnios he:שק שפיר nl:Vruchtwater

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