B-ultrasound gestational sac has only two data

During pregnancy, mothers usually choose to see a doctor and take an ultrasound to check the development of the fetus. However, many people are not very familiar with the B-ultrasound results and know nothing about the data above. Some people find that other people’s B-ultrasound orders have one more data than their own. At this time, they will wonder if there is a problem with the growth and development of their fetus, and even ask the doctor why the B-ultrasound gestational sac only has two data. In fact, it is better to take a look at the detailed introduction.

Is it normal that the fetal sac can only have 2 data?

Generally, the fetal sac item in the B-ultrasound report will have three pieces of data, which means length*width*height respectively. Generally, you can just look at the length. For example, the diameter of the gestational sac is 2 cm at 6 weeks of pregnancy, about 5 cm at 10 weeks of pregnancy, 2 cm at 1.5 months of pregnancy, and about 5 cm at 2.5 months of pregnancy. This data has an approximate reference standard.

Generally under normal circumstances, the fetal sac is located at the fundus, front wall, back wall, top, and middle of the uterus. Circular, oval and clear shapes are normal. If the fetal sac is irregular in shape, unclear, and located at the bottom, and the pregnant woman also has abdominal pain or vaginal bleeding, there is an immediate possibility of miscarriage.

How long does it take for the fetal sac to be seen in the ultrasound?

Generally speaking, the gestational sac can be seen by vaginal ultrasound at the first 5 weeks of pregnancy, and a little later by abdominal ultrasound. Because everyone's menstrual cycle is different, the time of pregnancy also varies in the short term. Therefore, the time when the gestational sac can be first seen under B-ultrasound is also different. For women with normal menstrual cycles, ultrasound can usually be performed about 42 days after menstruation to detect whether there is a gestational sac in the uterine cavity.

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.

Because individual differences are great and the health conditions of different pregnant mothers are different, it is normal for some pregnant mothers to see the gestational sac relatively late. Generally, pregnant mothers do not need to worry too much, because the development status of the fetus is different. As long as the size of the gestational sac is within the standard value range, the fetus can grow happily, so there is no need to worry too much.