What is the size of the fetus at gestational age?

In our lives, some parents are very concerned about the growth of the baby after the pregnant mother becomes pregnant. They look forward to the baby, pay attention to everything about the baby, and participate in the growth of a life. In fact, it is also a very happy thing, especially when parents are eagerly looking forward to the birth of the baby. These are very important. Therefore, if we pay attention to the size of the baby's body during pregnancy, we will be very happy, and it is also a very beautiful thing.

Each week of pregnancy changes differently. 4 weeks: The fetus is only 0.2 cm. The amniotic cavity is formed just after the fertilized egg has implanted and its volume is very small. Ultrasound cannot show clear signs of pregnancy. 5 weeks: The fetus grows to 0.4 cm and enters the embryonic period. The amniotic cavity expands and primitive cardiovascular system appears, which may beat. B-ultrasound can show a small gestational sac, which occupies less than 1/4 of the uterine cavity, or a fetal bud can be seen.

6 weeks: The fetus grows to 0.85 cm. The head, brain alveoli, facial organs, respiratory, digestive, and nervous organs are differentiated. The fetal sac is clearly visible on B-ultrasound, and the fetal bud and fetal heartbeat are seen. 7 weeks: The fetus grows to 1.33 cm. The embryo has the rudiments of a human being. The body segments are fully differentiated, the limbs are separated, and various systems are further developed. B-ultrasound clearly shows the embryo and fetal heartbeat, and the gestational sac occupies about 1/3 of the uterine cavity. 8 weeks: The fetus grows to 1.66 cm. The fetal shape is determined, and the head, body and limbs can be distinguished. The head is larger than the trunk. B-ultrasound shows that the gestational sac occupies about 1/2 of the uterine cavity, the fetal shape and fetal movement are clearly visible, and the yolk sac can be seen. 9 weeks: The fetus grows to 2.15 cm. The head is larger than the body, the various parts are clearer, the skull begins to calcify, and the placenta begins to develop. B-ultrasound shows that the gestational sac almost fills the uterine cavity, the fetal outline is clearer, and the placenta begins to appear. 10 weeks: The fetus grows to 2.83 cm, all fetal organs have been formed, and the rudiments of the placenta are formed. B-ultrasound shows that the gestational sac begins to disappear, a crescent-shaped placenta is visible, and the fetus is active in the amniotic fluid. 11 weeks: The fetus grows to 3.62 cm, the fetal organs develop further, and the placenta develops. B-ultrasound showed that the gestational sac had completely disappeared and the placenta was clearly visible. 12 weeks: The fetus grows to 4.58 cm, the external genitalia begin to develop, any deformities will be revealed, and the calcification of the skull becomes more complete. The skull halo is clear, the biparietal diameter can be measured, obvious deformities can be diagnosed, and the internal organs tend to become more complete afterwards.

In fact, pregnancy is a very complicated process for every mother. After fertilization, the embryo and its appendages enter the uterine cavity, and grow and develop rapidly until maturity. The baby's body will undergo different changes in each week of pregnancy. What will your baby be like in each week of early pregnancy? We parents can get some detailed understanding from the above descriptions. It is the responsibility of every parent to participate in the baby's growth and pay attention to the baby's physical health and development.