The relationship and development of yolk sac and embryo bud

Many of us may not know much about the relationship between the yolk sac and the embryo bud, which brings great distress to our female friends, and this problem is accompanied by great pain. At the same time, this disease is a secret that many people are reluctant to go to the hospital for treatment, resulting in worsening of the disease. Maybe everyone is more interested in the relationship between the yolk sac and the embryo bud. Let us understand the relationship between the yolk sac and the embryo bud.

Relationships and Development:

Note:

1.4 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.

2.5 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.

3.6 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.

4.7 weeks: The fetus grows to 1.33 cm. The embryo has the rudiments of a human being. The body segments have been fully differentiated, the limbs have been separated, and all systems have 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.

5. 9 weeks: The fetus grows to 2.15 cm. The head is larger than the body, all 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.

6.10 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.

7.11 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.

8.12 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.

The above content introduces us to the relationship between the yolk sac and the embryonic bud. Through the above content, we can solve our diseases as soon as possible and live a healthier life. At the same time, we can also save a large part of living expenses. I hope everyone can live a healthy and happy life!