Pregnancy Weekly Guide
[Week 17 Baby] Most of the organs are in place now.
Most of the organs are formed; now it's time for them to grow and mature. Your baby is blinking own eyes, sucking his thumbs, and busy swimming around.
The thumb-sucking is a practice for breastfeeding. But your baby is still so small that you may not feel them well, so don't worry.
Your baby is accumulating brown fat to maintain body temperature in the cold, outside world. And this brown fat will help regulate his body temperature once he is out.