<P> The fluid is absorbed through the fetal tissue and skin . After the 15th - 25th week of pregnancy when the keratinization of an embryo's skin occurs, the fluid is primarily absorbed by the fetal gut . </P> <P> At first, amniotic fluid is mainly water with electrolytes, but by about the 12 - 14th week the liquid also contains proteins, carbohydrates, lipids and phospholipids, and urea, all of which aid in the growth of the fetus . </P> <P> The volume of amniotic fluid increases with the growth of fetus . From the 10th to the 20th week it increases from 25ml to 400ml approximately . Approximately in the 10th - 11th week the breathing and swallowing of the fetus slightly decrease the amount of fluid, but neither urination nor swallowing contributes significantly to fluid quantity changes, until the 25th week, when keratinization of skin is complete . Then the relationship between fluid and fetal growth stops . It reaches a plateau of 800ml by the 28 - week gestational age . The amount of fluid declines to roughly 400 ml at 42 weeks . There is about 1L of amniotic fluid at birth . </P> <P> The forewaters are released when the amnion ruptures . This is commonly known as the time when a woman's "water breaks". When this occurs during labour at term, it is known as "spontaneous rupture of membranes". If the rupture precedes labour at term, however, it is referred to as "premature rupture of membranes". The majority of the hindwaters remain inside the womb until the baby is born . Artificial rupture of membrane (ARM), a manual rupture of the amniotic sac, can also be performed to release the fluid if the amnion has not spontaneously ruptured . </P>

Where does amniotic fluid go as baby grows
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