Week 31. A very fast growth. Its wee-wee.
It is more and more difficult for the baby to move and to stretch within the uterus because its growth is fastening. If its head is still not downwards it will be so this week. The lungs are almost fully developed. Its activity and fast growth continue in all aspects. To take an obvious example, every day your baby eliminates approximately half a litre of urine to the amniotic liquid.
The baby approaches the length that it will have at birth. After 31 weeks of gestation it weighs more than a kilo and a half.