10 weeks

Baby is now called a fetus in "medical terms". You, however, may have chosen the name "peanut," "angel," "jumping bean" or simply "miracle."
The most critical part of your infant's development is complete. Now you are headed into a period of rapid growth.
While a bit strange to envision, your baby's head is now about half its length - Soon the rest of the body's growth will catch up but this area is prepared to keep up with the rapid brain development!
Eyelids fuse shut and irises begin to develop - Eye color is also determined by this point.
Placenta begins to function this week or next - The placenta is the organ responsible for both the provision of nutrients along with the removal of waste to keep your baby growing strong!
Your baby will be about 1.22 inch long (3.1cm) and weigh 0.14 ounce (4gm) at the end of this week

9 Weeks

Week Nine
Baby has begun movement - While still too small for you to feel, your little one is wriggling, shifting, and dancing already! Makes you almost wish for a window to peek in whenever you want!
Most joints are formed now - and trust that your little one is practicing bending and flexing.
Fetus will curve its fingers around an object placed in the palm of its hand - This is amazing to see! At only nine weeks, if you happen to have an ultrasound, you may observe your infant fascinated by everything he or she can lay their fingers on (mainly other fingers, toes, ears and nose!
Fingerprints are already evident in the skin
Average size this week -- length 0.9 inch (2.3cm), weight 0.07 ounce (2gm)

8 weeks

Here is our baby from our first u/s!

7 weeks