Seven weeks pregnant, there is only one data in B-ultrasound single pregnancy sac, is it normal?

Seven weeks pregnant, there is only one data in B-ultrasound single pregnancy sac, is it normal?

There are two kinds of B-ultrasound in early pregnancy, one is before 9 weeks of pregnancy, mainly to see the gestational sac. B-mode ultrasound at 9 weeks 13 weeks of pregnancy mainly focuses on the length of head and buttocks. Doctors judge the development of the fetus according to the length of the gestational sac or head and buttocks, and determine the gestational age. Therefore, there is only one data in the 7-week gestational sac, which is normal. But there will be other inspection items in the B-ultrasound list. Here, I want to tell you how to look at the B-ultrasound list of gestational sac and head and hip length.

B-ultrasound examination of gestational sac

Before 9 weeks of pregnancy, the fetus was still very small, and the doctor judged the gestational age by measuring the size of the gestational sac. See if the fetal development is in line with the gestational age. Examination items: uterine position, gestational sac or embryo size, fetal heart rate, confirmation of intrauterine pregnancy, etc. Is the position of the uterus anterior or posterior?

As long as it is not placenta previa, it is normal. The size of gestational sac is related to ovulation and sexual intercourse time. If you have sex early, the gestational sac will be too big, otherwise it will be too small. Fetal heart mainly depends on whether the heart tube beats and whether it is a live fetus. If the B-ultrasound is done early and you can't see the fetal heart germ or gestational sac, you can wait for 60 days of pregnancy.

The items of single B-ultrasound examination at 7 weeks' gestation are relatively simple. This B-ultrasound sheet shows the gestational sac 1.7*3.2 cm, which is consistent with the gestational sac size of 7 weeks +4 days. There is a gestational sac in the uterus and the fetal heart tube beats, so the conclusion is intrauterine pregnancy, not ectopic pregnancy. Or a live fetus.

Head-hip length ultrasonic single

The head and buttocks are as long as the gestational sac. The only difference is that this time the head and hip length is measured, not the gestational sac.

The length of the top buttock is also the length of the head buttock, which is the distance from the fetal head to the fetal buttock. Generally, 7- 12 weeks is the most accurate calculation. The length of head and hip can not only reflect the normal development of fetus, but also be used to calculate the gestational age of pregnant mother.

Through the head and hip length of this B-ultrasound sheet, we can calculate the gestational age:

Gestational age =CRL (head and hip length cm) +6.5=2.5+6.5=9 weeks.

Because of the individual differences in fetal development and the implantation of fertilized eggs sooner or later, there will be some errors in the calculation of gestational age of head and hip length.

The subject's question is not very clear. Generally speaking, the B-ultrasound done at 7 weeks of pregnancy should be done for the first time during the whole pregnancy. The main contents are as follows:

1. Are you pregnant?

Diagnosis of pregnancy, embryo implantation, singleton or multiple births, intrauterine pregnancy or ectopic pregnancy, etc.

2. Development of gestational sac.

There is a gestational sac about 7 weeks pregnant, and the size of gestational sac will be recorded on the B-ultrasound, and whether there is fetal heart germ.

3. Whether there is threatened abortion.

B-ultrasound will reflect whether the embryo size is consistent with the gestational age, whether there is threatened abortion, and whether it is necessary to carry out fetal protection treatment.

4. Uterus and accessories.

Look for abnormalities such as ovarian cysts and fallopian tube masses, and deal with them as soon as possible.

That's my answer. I hope I can help you.

Good luck with your pregnancy!

Seven weeks pregnant, B-ultrasound single pregnancy sac can not only have one data, the subject is not very clear.

A 7-week-old B-ultrasound may show the following data.

1, uterus: anterior position, size 58 54 55 mm

2. Gestational sac size: 3 1 20 35mm, yolk sac visible, germ visible, length of top buttock 10mm, heartbeat visible, uterine cavity in gestational sac.

3. Left ovary: 2318mm.

4. Right ovary 25 65 438+06mm.

Specific changes in the relationship between gestational sac size and gestational age

At 4 weeks, the fetus is 0.2 cm, the fertilized egg has just been implanted, the amniotic cavity has just formed, and the volume is very small.

At 5 weeks, the fetus grows to 0.4 cm, enters the embryonic stage, the amniotic cavity expands, and the primitive cardiovascular system appears and beats. Small fetal sac or embryo can be seen by B-ultrasound.

At 6 weeks, the fetus grew to 0.85 cm, and the head, facial organs, digestive organs and nerves of the fetus were differentiated. See germ and fetal heart.

At the seventh week, the fetus grew to 65438±0.33cm, and the embryo began to resemble a human figure. The limbs were separated, showing a fetal heartbeat, and the fetal sac occupied 65438 0/3 of the uterine cavity.

At 8 weeks, the fetus grows to 1.66 cm, which can be divided into fetal head, trunk and limbs. The fetal sac accounts for about 1/2 of the uterine cavity, and the yolk sac can be seen.

B-ultrasound is not recommended 8 weeks ago, when the embryo is too small and delicate, which will affect the development of the embryo. B-ultrasound can be done after 8 weeks.

The subject's question is not clear. Even if there is only one data on your B-ultrasound list, you should make it clear what data it is and how much data it is, so as to know whether it is normal or not. Since the topic is not clear, here, I briefly introduce what changes should be made in the B-ultrasound gestational sac from the sixth week to the tenth week of pregnancy.

Generally, after five weeks of pregnancy, B-ultrasound can only see the small fetal sac. If the implantation is late, it will take a few days to see it. Gestational sac is the primitive placental tissue and the initial form of pregnancy. At this time, the fetus has not yet formed, only the embryo and the original fetal heart beat. The growth of gestational sac is related to the growth and development of fetus. In the sixth week of pregnancy, most fetuses grow to about 0.85 cm. The fetal head, brain vesicles, facial organs, respiratory organs, digestive organs, nerves and other organs have begun to differentiate, and the fetal sac can be clearly seen by B-ultrasound. In the seventh week of pregnancy, the fetus grows to about 1.33cm, and it has taken shape. Body segments are all differentiated, limbs are separated, and internal organs are further developed. B-ultrasound can clearly see the heartbeat of embryo bud and the fetus, and the fetal sac accounts for about one third of the uterine cavity. At the eighth week of pregnancy, the fetus grows to about 1.66 cm, which is completely adult-shaped and can be divided into head, body and limbs. The fetal head is larger than the trunk, and the yolk sac can be seen by B-ultrasound, and the fetal shape and fetal movement can be clearly seen. The fetal sac accounts for about half of the uterine cavity. In the ninth week of pregnancy, the fetus grew to about 2. 15 cm, and all parts of the body became clearer in the B-ultrasound display. The skull began to calcify and the placenta began to develop. B-ultrasound showed that the outline of fetus and placenta was clear, and the fetal sac almost occupied the uterine cavity. In the tenth week of pregnancy, the fetus grows to about 2.83 cm, the placenta of the embryo has been formed, and various organs of the fetus have also been formed. B-ultrasound showed that the fetal sac began to disappear, the placenta was crescent-shaped, and the fetus moved in amniotic fluid.

After 40 days of pregnancy, you can basically see the small gestational sac by doing B-ultrasound. Generally, the data on the B-ultrasound table is the length of two vertical diameter lines: the size, length and width of the gestational sac. Doctors can calculate the time and days of pregnancy by the maximum diameter of the gestational sac. Therefore, the B-ultrasound of gestational sac should show three data, and some only show two, probably because the latter two data are the same. So I don't understand what the subject means when he says there is only one data, so I can only briefly introduce the above contents. Good pregnancy!

At this time, we can't judge whether the embryo develops normally only by the time of 7 weeks of pregnancy, but we can see whether or when the embryo will develop into a fetal heart embryo according to the "time" (Figure 4).

The normal situation of the first prenatal B-ultrasound is that the embryo is developing in the uterus (intrauterine pregnancy), the embryo has fetal heart embryo, the size of gestational sac, the number of gestational sacs, the number of gestational weeks, or there are other data, such as whether the pregnancy position is before or after, and there is fluid in the pelvic cavity (a small amount), which proves that it is a live fetus, and the pregnant mother can continue to be pregnant and the fetus can continue to develop and grow.

The time of embryo development to form fetal heart embryo is related to the menstrual cycle of pregnant mothers before pregnancy. For example, a pregnant mother who has a menstrual cycle of 28 days and menstruates according to the Times every month will ovulate normally during ovulation, and both husband and wife will have sex during this time. If eggs and sperm are normally combined into fertilized eggs, they will be implanted on the 7th 7- 10/0 day after sexual life. According to the time of normal embryo development, the embryo will be pregnant at the earliest.

If the menstrual cycle before the pregnant mother is more than 28 days (for example, 30 days or 90 days is a cycle) or the monthly menstruation is irregular (early or late), it is also possible that the fetal heart (or embryo) will not be seen in the seventh week of pregnancy, because the ovulation time of the pregnant mother is delayed, and the implantation time of the fertilized egg will be delayed after pregnancy, which is equivalent to a short embryonic development time, and it will take a little time for the embryo to develop into a fetal heart embryo.

Some pregnant mothers are still worried that they don't have a fetal heart embryo after 7 weeks of pregnancy, and that the embryo will eventually develop into a fetal heart embryo. In fact, the quality of embryos can be traced back. For example, yolk sac, which is the premise for the embryo to develop into a fetal heart embryo, generally appears in the fifth week of pregnancy. Its function is to supply blood and provide nutrition for embryos.

If there is no yolk sac in the gestational sac at 7 weeks, it is equivalent to an empty sac. No matter how long the pregnant mother waits, it will not give birth to fetal heart disease. Pregnant mothers are advised to make multiple diagnoses. If there is yolk sac in the gestational sac, the pregnant mother can recall her previous menstrual cycle, and whether the menstruation is on time every month may belong to the second situation mentioned above, or do blood hcg and progesterone, and the hcg value can reflect the quality of the embryo.

Hi, pregnant mothers, on which day did you find that the embryo had a fetal heart and embryo bud?

I think it's normal, and many of them can't be seen in 9 weeks.

Before 9 weeks of pregnancy, doctors usually measure the size of the gestational sac. Only one data is normal at this time.

It is normal. You can do a B-ultrasound in about 60 days to see [flash by]. Everyone's situation is different and accurate. Some people also say that there is nothing 100% in medicine, so it is good for the baby's development for the expectant mother to relax. I believe your baby must be a strong baby. Besides, it's no use worrying. A good embryo will not be lost because of sneezing [lighting the safety light].