The baby sucks his thumb and becomes more energetic. Pseudo-feces - meconium - are formed in the fetal intestines, and the kidneys begin to work. During this period, the brain develops very actively.
The auditory bones become ossified and are now able to conduct sounds, the baby hears the mother - the heartbeat, breathing, voice. The fetus rapidly gains weight and fat deposits form. The weight of the fruit reaches 650 g, and the length is 300 mm.
At this stage of fetal development, the lungs are so developed that the baby can survive in the artificial conditions of the intensive care unit.