The ultimate HerFamily guide to your pregnancy: Week 31
Week 31 – You're in the 3rd Trimester! Read more about trimesters here.
At 41 cm your baby is now the size of a large pineapple weighing about 1.5 kg.
The central nervous system is now so developed it can control its own body temperature.
As space in your womb is getting tighter movements become less dramatic, but the head turns from side to side, and a dig from that elbow or a kick in the ribs can really hurt, or make you gasp in surprise.
You may get a bit of a fright when your belly begins to tighten and relax at irregular intervals. These are only Braxton Hicks, practice contractions. They can be very frequent and uncomfortable (and even painful as you get closer to labour). However, unlike real contractions they have no pattern.