none what so ever :D
An embryo during the late stages of development is known as a fetus.
the organs grow larger
The embryonic period extends to the end of the eight week. After the embryonic period (8weeks), the developing human is called a fetus.
After a sperm fertilizes an egg its referred to as a zygote. Then it becomes a fetus, I believe after the first trimester.
The first trimester ends at week 13, when the developing embryo becomes a fetus.
After a sperm fertilizes an egg its referred to as a zygote. Then it becomes a fetus, I believe after the first trimester.
The first trimester and then it's usually because the embryo/fetus is not viable but damaged by nature somehow.
The definition of early pregnancy is known as the first trimester. The duration of the first trimester is 12 weeks, and includes conception, implantation, development of the embryo and development of the fetus.
In the first trimester it's usually because there's something wrong with the embryo/fetus and it wouldn't survive.
Fetus is name given to human embryo after it is recognizable as human embryo .
For the first 8 weeks the developing human is called an embryo after that it is called a fetus.
At the first cell division of the zygote (fertilized egg), according to Wikipedia: http://en.wikipedia.org/wiki/Embryo