If a person were to have a water birth, keep the ambilical cord connected,and leave the baby under the water, why wouldn’t it survive if it spent 9 months submerged in amniotic fluid? /u/Still-Mistake-3621 No such thing as stupid questions

Water has oxygen, and if it survived submerged in fluid, why would the baby only drown after the fact??? How and why would the lungs just suddenly switch to needing air instead of what it was using perfectly fine before?

Water has oxygen, and if it survived submerged in fluid, why would the baby only drown after the fact??? How and why would the lungs just suddenly switch to needing air instead of what it was using perfectly fine before?