It's a Fetus.

We saw the doctor yesterday and everything is going well. This baby moved around during the ultrasound more than Samantha ever did. Are you thinking boy? I am!

Your Baby: Transition Time
At about nine weeks after conception, your embryo has developed enough to be called a fetus, and the most important part of its development is over. The baby will grow a great deal at this time -- from about 1 inch long at the beginning of the week, to about 2 inches by the end (with its head measuring about half its length). The eyelids will fuse shut, and the irises will begin to form. At some point this week or next, blood will circulate between the baby and uterus through the umbilical cord, and the placenta will begin to function, providing oxygen and nutrients.