You shouldn't be big at all. At five weeks pregnant you have just developed an embryo. An ultrasound typically will not even be able to detect a heartbeat yet.
If you mean 4 weeks after conception the embryo is about 1/6 to 1/4 inch (4 to 6 millimeters) long.
For the first 8 weeks the developing human is called an embryo after that it is called a fetus.
it takes four weeks for the organs of an embryo to form..
24 weeks
An unborn baby that is less than 8 weeks old, is an embryo, after this it is classified as a foetus.
how big is the embryo when you began to hear its hearbeats?
Fetus
10 weeks.
Twenty-six weeks is six months.
The death of an embryo or fetus in the first 20 weeks of pregnancy is called a spontaneous abortion.
After 8 weeks