At week 17 your baby is now around the size of an onion and measures about 13cm (5 inches) in length. Her weight is now close to 170 grammes (6oz).
A new kind of growth spurt is just around the corner for your baby. Until this point, your baby has met many milestones in her development such as the growth of limbs and internal organs. Soon, she will be developing fat tissue which will not only fill out her little body, but will also serve to regulate her body temperature and store energy. In fact, in an 8 pound newborn baby, more than 5 pounds of the weight is pure fat.
If you were to be able to see your baby during week 17, you would see a long, lanky baby, with thin legs and arms, and skin that is extremely wrinkled. However, once your baby starts developing fat tissue, her body will start to plump up and she will look more like a newborn baby with chubby cheeks and legs.
Your baby’s face is also continuing to develop as eyes and ears move into their proper position. Her brain is beginning to develop the areas that will control her sense of taste, touch, hearing, smell, and vision. It is known that even in these early stages of pregnancy, your baby can hear and will be able to see light in several weeks.
At only 170 grammes, your baby is still very tiny but is also very active. Even at this small size, your baby is now large enough that she could kick and make movements that you can actually feel.