also called amnion. A lining inside the uterus that contains the fetus and the fluid that cushions the fetus. This fluid is called amniotic fluid. The term â€œwater breaksâ€ refers to the amniotic sac breaking; this often occurs at the beginning of labor.
The thin walled sac inside the uterus that surrounds the baby, amniotic fluid and the placenta during pregnancy. It has a capacity of about 4 to 5 liters at term. The wall of the sac is made up from the amnion, chorion and decidua, each of which are just a few cell layers thick, and which extends from the margin of the placenta. While each of the layers are in contact, they are not fused together. The sac serves to maintain the equilibration hydrostactic pressure within the uterus during pregnancy. During labor the sac transmits uniform pressure of the uterine contractions to the cervix for dilation.
(Amnion) - A thin, tough, membranous sac that encloses the embryo or fetus of a mammal, bird, or reptile. It is filled with a serous fluid in which the embryo is suspended.
a fluid-filled pouch in the uterus, made of a membrane called the amnion, which encloses the embryo and protects it from trauma. When a pregnant woman's 'waters break', the amniotic sac has ruptured, releasing the fluid within.
the membranes composed of two layers, containing the fetus and amniotic fluid.
a double-layered membrane formed from the fusion of the amnion and chorion; it encloses the embryo and is filled with amniotic fluid.
A kind of water bed inside the female uterus in which the human embryo develops into a fetus and which cushions the embryo, keeping it at a constant temperature.
Thin membrane that encloses the fetus and contains amniotic fluid.
Amniotic sac is the sac that surrounds the baby inside the womb which contains the baby, the placenta and amniotic fluid.
The membranous bag that surrounds the foetus and becomes filled with amniotic fluid as pregnancy advances.
The bag in which the fetus and amniotic fluid are contained during pregnancy.
A bubble like sac that surrounds the baby while it is inside of the mother's uterus. The amniotic sac is filled with amniotic fluid. The unborn baby is basically underwater for nine moths before it is born
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
A fluid-filled sac in the mother's uterus where the fetus develops.
the sac, formed by the amnion and chorion (membranes), in which the fetus lies inside the uterus.
The pouch that contains the amniotic fluid.
The thin-walled bag that contains the protective liquid, that surrounds the fetus during pregnancy.
a thin-walled sac that surrounds the fetus during pregnancy. The sac is filled with amniotic fluid - liquid made by the fetus and the amnion (the membrane that covers the fetal side of the placenta) which protects the fetus from injury and helps to regulate the temperature of the fetus.
refers to the thin, membranous sac that contains amniotic fluid and the developing fetus during pregnancy.
(bag of water)- membranous sac containing amniotic fluid which surrounds the fetus in utero. When the sac breaks, there will be a leak or a gush of amniotic fluid; synonymous with "ruptured membranes" or "water breaking."
The sac or "bag of waters" filled with amniotic fluid in which the developing baby grows. The membranes which make up the sac may occasionally rupture naturally as labour begins, but usually remain intact until the end of the first stage of labour. The membranes may also be broken by a midwife or doctor to speed up labour.
The fluid-filled sac in the mother's uterus where the fetus grows.
The sac that holds the protective liquid called amniotic fluid that surrounds the fetus.
fluid-filled membrane or sac that surrounds the developing embryo while in the uterus; also "bag of water"
The membrane that surrounds the baby in the uterus and contains amniotic fluid in which the baby floats. Also called the bag of waters, the amniotic sac will rupture naturally or be ruptured artificially during labor.
the membrane within the uterus that contains the baby and the amniotic fluid.
The amniotic sac is the sac that surrounds baby inside the uterus. It contains the baby, the placenta and the amniotic fluid. --See also Bag of Waters.
or the thin membrane which encloses the baby and the amniotic fluid. At full term there is roughly a quart of amniotic fluid surrounding the baby. About one third of this fluid is constantly being replenished every hour.
Fluid-filled, transparent protective membrane surrounding the fetus.
the protective membrane filled with fluid that surrounds the developing embryo, providing warmth, moisture and relative freedom of movement.
Membranes which contain the fetus and the amniotic fluid. The amniotic sac and the amniotic fluid are often refereed to as the "bag of waters."
The amniotic sac is a tough but thin transparent pair of membranes, which hold a developing embryo (and later fetus) until shortly before birth. The inner membrane, the amnion, contains the amniotic fluid and the fetus. The outer membrane, the chorion, contains the amnion and is part of the placenta.