a baby
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 major organs systems have started developing.
The first trimester is most critical for the development of a baby. The babies brain is formed during the first trimester.
Hormones such as progesterone and human chorionic gonadotropin (hCG) play crucial roles in maintaining pregnancy during the first trimester. A deficiency or imbalance in these hormones can lead to complications such as a miscarriage. Additionally, stress-related hormones like cortisol can also impact pregnancy outcomes by affecting the body's ability to support a developing fetus.
Yes, perfectly normal. It's called implantation bleeding.
It is part of the first trimester
After a sperm fertilizes an egg its referred to as a zygote. Then it becomes a fetus, I believe after the first trimester.