The fetus is enclosed and safeguarded by the amniotic sac. By way of the umbilical chord, nutrients are transferred from the mother to the fetus through the placenta.
Most of the time, the sac bursts before the baby is born during childbirth. A baby is rarely born in an unbroken sac. Being born in a caul is what this is known as.
In the amniotic sac, a developing baby is growing. The placenta, which is attached to the fetus via the umbilical cord, is housed in the sac. The placenta transfers gas, exchanges nutrients, and filters waste. A single amniotic sac that can expand to hold both fetuses may be shared by identical twins.
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