The embryo lasts until about week 10 or 11 and then it is known as a fetus.
Embryo
For the first 8 weeks the developing human is called an embryo after that it is called a fetus.
It depends on what organism the embryo comes from.
The embryo is the first stage of a baby's life then after 12 weeks it is called a fetus.
After the 8th week, the embryo is called a fetus.
The death of an embryo or fetus in the first 20 weeks of pregnancy is called a spontaneous abortion.
When you have a abortion and not everything comes out. The embryo/fetus is dead but the uterus did not empty properly. You will then need a D&C.
After the first eight weeks, the embryo is referred to as a fetus. At this stage, the major organs have formed and the fetus continues to grow and develop until birth.
Fetus is name given to human embryo after it is recognizable as human embryo .
An Embryo is a stage before Fetus, the Fetus is more developed than an Embryo, the stage of Birth and a baby being more developed than a fetus.
Fetus
At the first cell division of the zygote (fertilized egg), according to Wikipedia: http://en.wikipedia.org/wiki/Embryo