What are the prenatal growth phases?
The three main phases of prenatal growth do not match three trimesters of pregnancy. The germinal stage begins at the time of conception, ending in implantation, at this point most women realize that they are pregnant because the test can pick up pregnancy hormones issued after Blastocyst implants. During the embryonic stage, blastocysta grows into an embryo and the cells separate into different groups to create many body systems. Finally, the entrance to the fetal stage is as soon as the body systems are developed, which simply grow at this point. All three phases of prenatal growth either begin or end in the first trimester, after which the fetus continues to grow until it is developed enough to withstand life outside the womb.
As soon as the sperm successfully connects with the egg and conception, the germ stage of the prenatal growth begins. The egg becomes known as a zygota as soon as it is fertilized and begins to move towards the uterus, thenZygota cells begin to divide quickly in a process called mitosis. It consists of a blastocyst, which consists of three parts, one of which is a mesoderm that has developed into skeletal and muscle systems. Endoderm is another part that later becomes a respiratory and digestive system, while Ectoderm eventually becomes a nervous system and skin. The germinal stage ends when blastocyst implants into the uterus wall, which is usually just before most women find pregnancy.
embryonic stage usually lasts from the second week of life to the eighth, during which both the umbilical cord and the placenta are created. Embrya cells consist of various systems, organs and tissue of the body, resulting in creating features such as eyes, ears, ears, fingers and most other anatomical and physicaliological features. At the end of the embryonic stage of prenatal growth, needs are formed and need time to grow and mature.
weeks of nine to 40 pregnancies are considered a fetal stage of prenatal growth and above allconsist of the ripening of the organs. At this point, the embryo becomes a fruit and spinal cord and the brain is made up of a nerve tube. The rest of the pregnancy is devoted to adding weight and length to the fetus and allows the systems of its body to become refined enough to survive even outside.