Foetus at 4 months - Breathing

By the end of the fourth month, your baby has already begun to practice breathing. They inhale and exhale small amounts of amniotic fluid to help their lungs develop further. This is how they end up with hiccups.

Attribution: Avallain

See also:

• Foetus urine production at month 4
• Foetal movement at month 4
• Foetus arms and legs at month 4
• Foetus hair and bones at month 4