What is the most important prenatal phase of development?
Fetal Stage\n\n The fetal period of prenatal develop marks more important changes in the brain. This period of development begins during the ninth week and lasts until birth. This stage is marked by amazing change and growth. The early body systems and structures established in the embryonic stage continue to develop.
Why is prenatal period the most crucial period in development?
In general, major defects of the body and internal organs are more likely to occur between 3 to 12 embryo / fetal weeks. This is the same as 5 to 14 gestational weeks (weeks since the first day of your last period). This is also referred to as the first trimester.
What are critical periods within prenatal period of development?
The fetus is most vulnerable during the first 12 weeks. During this period of time, all of the major organs and body systems are forming and can be damaged if the fetus is exposed to drugs, infectious agents, radiation, certain medications, tobacco and toxic substances.
What takes place during the prenatal period of development?
Let's take a closer look at the major stages and events that take place during the prenatal period of development. The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period,...
Why is the first trimester the most critical stage of pregnancy?
Since your baby’s most critical development occurs in this stage, the baby is most vulnerable to injury from multiple factors like a cigarette, alcohol, X-ray radiation, and certain drugs. It is during the first trimester where damage can occur to the developing organs and result in birth defects or disfigurements.
What happens during prenatal pregnancy?
At this stage of prenatal pregnant development the neural tube of the baby forms. Then the head starts to develop along with the nose, eyes, mouth and ears. The cardiovascular system is the first one to develop and the blood vessel that will later become the heart starts to pulsate. This 3 rd stage starts when the cell division is completed.