What is the normal size of the gestational sac during pregnancy?

After a woman becomes pregnant, she will have regular check-ups. People often ask what the specific content of the check-ups is. In fact, the check-ups are mainly to see whether the mother and fetus are healthy, the size of the fetus, and the fetus' current physical condition. Generally speaking, the fetus is different in each period, and there will be certain changes every week. The health of the fetus is very important, so all indicators must be normal during the check-up, otherwise it will affect the health of the fetus. But what is the normal size of the gestational sac during pregnancy?

Pregnant mothers are very concerned about all the developmental indicators of their babies, especially those who have gone through the difficult process of preparing for pregnancy. They will be frightened if various pregnancy indicators are not met. The editor has compiled some comparison indicators of gestational sac size from 4 to 12 weeks.

What is the normal size of the gestational sac at 8 weeks of pregnancy?

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 any signs of pregnancy.

2.5 weeks: The fetus grows to 0.4 cm and enters the embryonic period. The amniotic cavity expands, primitive cardiovascular system appears, and 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, and the head, brain vesicles, facial organs, respiratory, digestive, and nervous organs are differentiated. The fetal sac is clearly visible on ultrasound, and the embryo bud and

Fetal heartbeat.

4.7 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.

5.8 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.

6.9 weeks: The fetus grows to 2.15 cm, the head is larger than the body, the various parts appear 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.

7. 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.

8. 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.

9.12 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.

Expectant mothers can compare the test results with the pregnancy time to see if the size of the gestational sac is normal. If it is too large, it will be more difficult for the baby to be born. If it is too small, the fetus will not be able to get enough nutrition, so it is best to ensure that the baby is within the normal range. Pregnant mothers should not eat less to maintain their figure, nor should they only focus on the nutrition of the child. Eating too much will make childbirth more difficult.