The embryonic period extends to the end of the eight week. After the embryonic period (8weeks), the developing human is called a fetus.
For the first few weeks it is called a zygote, and after that it is called an embryo. Later on it is called a fetus.
Fetus
fetus
fetus
fetus
a baby
The major organs systems have started developing.
The major organs systems have started developing.
The website Womenshealth offers a nice overview of the stages of pragnancy. This also includes a section about the developing baby in the first trimester.
The first trimester ends at week 13, when the developing embryo becomes a fetus.
The traditional designations are: During the first trimester - abortion (spontaneous abortion, if you want to avoid ambiguity) During the second trimester - miscarriage During the third trimester - stillbirth
Some people gain no weight during the first trimester, particularly if they have morning sickness. Other people gain a small amount, particularly towards the end of the first trimester. The most weight is gained during the second trimester though.
The first trimester is most critical for the development of a baby. The babies brain is formed during the first trimester.
What hormones could be implicated in failing to maintain the pregnancy during the first trimester?
Yes, perfectly normal. It's called implantation bleeding.
After a sperm fertilizes an egg its referred to as a zygote. Then it becomes a fetus, I believe after the first trimester.
It is part of the first trimester