9-week gestational sac size comparison table

Pregnancy is a complicated process. After the egg is fertilized, it enters the uterine cavity. During the rapid growth and development of the embryo and attachments to perfection, there are different changes in each week of pregnancy. The gestational sac is the initial embryonic tissue, and its size can show whether the fetus is growing and developing normally. The gestational sac at 9 weeks of pregnancy can also be found in the correspondence table. Below I will introduce the fetal sac correspondence table to everyone.

4 weeks: The fetus is only 0.2 cm. The amniotic cavity is formed just after the sperm and egg combine and the embryo implants, and its volume is not large. Ultrasound cannot clearly show signs of pregnancy.

5 weeks: The fetus grows to 0.4 cm and enters the test tube embryo stage. The amniotic cavity expands, initial cardiovascular and cerebrovascular diseases appear, and heart beats may be present. B-ultrasound can show a small gestational sac, which occupies less than 1/4 of the uterine cavity, or the embryonic bud and fetal heartbeat can be seen from it.

6 weeks: The baby grows to 0.85 cm, the head, brain alveoli, frontal organs, respiratory, digestive, and nervous organs of the baby are divided, the gestational sac is clearly visible on B-ultrasound, and the fetal bud, fetal heart rate and fetal heart rate are seen.

7 weeks: The fetus grows to 1.33 cm. The test tube embryo has a human prototype. The body segments have all been divided, the limbs have separated, and the various systems are further developing. B-ultrasound clearly shows the embryo, fetal heart rate and fetal heart rate. The gestational sac occupies about 1/3 of the uterine cavity.

8 weeks: The fetus grows to 1.66 cm, the fetal shape is fixed, the fetal head, body and limbs can be separated, and the fetal head is larger than the body. B-ultrasound shows that the gestational sac occupies about 1/2 of the vagina, the shape of the fetus and the fetal movement are clearly visible, and the yolk sac can be seen.

9 weeks: The fetus grows to 2.15 cm, the fetal head is larger than the embryo, the main manifestations of each part are clearer, the head begins to thicken, and the embryo begins to grow. B-ultrasound shows that the gestational sac is almost filling the uterine cavity, the outline of the fetus is clearer, and the embryo has just begun to appear.

10 weeks: The fetus grows to 2.83 cm, the fetus's internal organs have been formed, and the embryonic prototype is formed. B-ultrasound showed that the gestational sac had begun to shrink, and the crescent-shaped embryo was visible, and the fetus was active in the amniotic fluid of the pregnant woman.

11 weeks: The fetus grows to 3.62 cm, the fetus's internal organs continue to grow and develop, and the embryo grows and develops. B-ultrasound showed that the gestational sac had completely disappeared and the embryo was clearly visible.