Fetal Weekly Change Process Chart
With the continuous advancement of science and technology, people are paying more and more attention to the developmental changes of the fetus. From the fertilized egg to the birth of the fetus, the fetus goes through many stages of growth and changes. Below we will introduce in detail the weekly changes of the fetus from four aspects.
First to fourth week
In the first to fourth weeks, the fetus is just a tiny group of cells and has not yet formed a head and tail. During this time, the fertilized egg moves toward the uterine wall and implants. In most cases, the fetus divides into small balls of seven to ten cells. As the cells divide, the fertilized egg becomes an embryonic sac. During the fourth week, the embryonic sac gradually transforms into an embryo with three layers of cells, namely the inner, middle and outer germ layers. They evolved into blastoderm endoderm, blastoderm middle layer and blastoderm outer layer respectively.
The fifth week to the eighth week
Between the fifth and eighth weeks, the five organs in the fetal head, including the eyes, nose, mouth, ears, and tongue, begin to form. In addition, the limbs also begin to develop into hands and feet. During this period, the fetus measures about two to three centimeters and weighs about three grams. During the eighth week, all five major organs of the fetus are formed.
Week 9 to Week 12
From the ninth to the twelfth week, the fetus\’s limbs grow significantly, and the fingers and toes begin to form. The fetuses reach about five centimeters in size and weigh about fifteen grams. During this period, the fetus becomes more mobile and most of its organs and features have developed. The heart begins to use blood and oxygen to function.
Thirteenth to sixteenth week
Between the 13th and 16th weeks, your baby\’s skin gradually becomes more pigmented and elastic. The baby\’s head becomes more proportional, and the wrinkles on the skin begin to diminish. In addition, the fetus\’s kidneys, liver, and spleen begin to function. During this period, the size of the fetus has reached about ten centimeters and its weight is about one hundred grams.
Overall, fetal growth and changes are a complex and amazing process. With the continuous advancement of technology, we can better understand the developmental changes of the fetus in order to better care and protect the growth of the fetus. I hope we can always pay attention to and protect our future generations.
