Why doesn't the foetus drown in amniotic fluid?

Why doesn’t the foetus drown in amniotic fluid?

Because in reality, his lungs don’t fulfill a real respiratory function. It is true that the amniotic fluid with which the baby lives penetrates into the lungs through trachea and trachea, which is also necessary because it promotes the development of these organs. But let’s say that the breathing mechanism, through which the lungs receive air, take oxygen and expels it, has not yet been put on. So there is no drowning.

What’s curious is that the foetus expels this fluid through a muscle routine similar to breathing, which serves both as “training” and training aid.

But how does the newborn child receive the necessary oxygen? Finally, by the umbilical cord that connects him to his mother. The blood it provides to the placenta contains the oxygen and the nutritional elements the baby needs at any time. And as the needs vary over pregnancy, the composition of this intake and all amniotic fluid changes over the weeks.

The amount of liquid also varies: it appears in the fifth week with about 50 ml to complete the pregnancy in about one litre (1 ML).