Ms. Ding is a expectant mother who is pregnant for the first time. She saw some rumors on the Internet saying that vaginal B -ultrasound would be harmful to the fetus, which may stimulate the uterus and cause abortion or deformity.She was afraid that such a thing happened, so every time she went to the hospital for a birth check, she refused to do vaginal B -ultrasound and only do abdomen B -ultrasound.
Her friends have repeatedly explained to Ms. Ding that vaginal B -ultrasound is a safe and non -invasive way of examination, which can more clearly observe the development of the fetus, especially in the early pregnancy.
She also told Ms. Ding that the vaginal B -ultrasound will not directly contact the uterus or fetus, nor does it produce radiation or thermal effects. As long as the operating specifications, there will be no impact on the fetus.
She also quoted some authoritative information to prove the security and necessity of vaginal B -ultrasound.But Ms. Ding still didn’t believe it, she felt that her friend’s point of view was wrong.She believes that her abdomen B -ultrasound results are normal, and there is no need to do excess examination.
She also searched some articles and comments against vaginal B -ultrasound on the Internet to support her views.She feels that she knows the needs of her body and fetus better than a doctor.
So, will the vaginal B -ultrasound of pregnancy have a adverse effect on the baby?
The vaginal B -ultrasound is a commonly used ultrasonic examination method for gynecological. The principle is to use the reflection characteristics of ultrasonic in different media, and then through computer processing to display images on the screen.Different tissues have different reflection intensity of ultrasonic waves, so they show different brightness in images.
Generally speaking, the more dense the organization is, the stronger the reflection, the brighter the image; the more loose the organization, the weaker the reflection, and the darker the image.The liquid tissue has almost no reflection to ultrasonic waves, so it is black on the image.
The operation method of the vaginal B -ultrasound is to put a dedicated probe on a disposable plastic case, apply an appropriate amount of coupling agent, and then gently insert it into the patient’s vagina, and the probe towards the cervix or the rear dome.
The probe can be moved or rotated in the vagina to observe organs from different angles and positions.The distance between the probe and the organ is close, so you can get a clear image.During the examination, patients should be relaxed and cooperated to avoid excessive tension or activities.
The vaginal B ultrasound is widely used. Generally, when the vaginal B-ultrasound is done in the early pregnancy, the fetal sac can be found at 4-5 weeks of pregnancy, and the fetal heart can be heard at 5-6 weeks.Pregnancy and evaluate fetal development.
The vaginal B -ultrasound can also check the position and shape of the placenta, as well as the amount and quality of the amniotic fluid, eliminate or discover the premature peeling of the placenta, the prefix of the placenta, too much or too little amniotic fluid.In addition, vaginal B -ultrasound can also diagnose abnormal pregnancy such as ectopic pregnancy, ectopic pregnancy, nourishing cell diseases, and deal with them in time.
In addition, when infertility, the vaginal B -ultrasound can observe the size, form, location and echo of the ovaries, as well as the development and ovulation of follicles, and determine whether there are problems such as polycystic ovary syndrome, premature ovarian failure, and ovarian cyst.
In addition, the vaginal B -ultrasound can also check whether the fallopian tube has effusion or pus, and whether the pelvic cavity has effusion or adhesion to determine whether there is infertility caused by fallopian tubes blocking or inflammation.
In addition, in addition to the above situations, the vaginal B -ultrasound can also be considered when the menstrual abnormalities and gynecological tumors occur.
This is a question that many expectant mothers care about. The answer is that there is no exact evidence that vaginal B -ultrasound can cause any adverse effects on the fetus.Ultrasonic is a non -ionized radiation that does not destroy the genetic material of cells like X -ray.
Moreover, the probe of the vaginal B -ultrasound is only gently placed in the vagina, and it will not touch the uterus or fetus, nor will it cause contraction or water break.Therefore, the vaginal B -ultrasound does not increase the risk of abortion.
Regarding whether the vaginal B -ultrasound has an influence on the baby, many experiments have been studied clinically.B -ultrasound research on fetal safety is mainly divided into two categories: animal experiments and crowd observation.
Animal experiments can simulate the effects of B -ultrasound on different strengths, frequencies, time, and patterns on the fetus, and observe changes in their physiological, behaviors, biochemistry, and form.The crowd observation is based on the number of times, time and methods of the B -ultrasound examination of the B -ultrasound, and compare the weight, length, head circumference, gender ratio, malformation rate, intellectual development and other indicators of their fetus.
The results of animal experiments show that low -intensity B -ultrasound has no obvious adverse effects on the fetus, but high -intensity or long -term B -ultrasound may cause the fetus to grow slowly, abnormal bone development, nervous system injury, chromosome distortion, etc.However, the limitations of animal experiments are that they cannot fully simulate human situations, and experimental conditions are often much higher than the level of clinical use.
The results of crowd observation show that the B -ultrasound of clinical use has no adverse effects on the fetus.Many large samples, multi -centered, forward -looking or retrospective studies have not found that the B -ultrasound is significantly correlated with the weight of the B -ultrasound, the body’s weight, length, head circumference, gender ratio, malformation rate, and intellectual development.
Among them, the most representative is the random control test (RCT) sponsored by WHO’s sponsorship involving 8 countries and more than 150,000 pregnant women. This test divides pregnant women into two groups: one is a conventional nursing group, according to the countries of various countries, according to the countries of various countries.Standard 1-2 B-ultrasound examinations; the other group is to increase the B-ultrasound group, and the B-ultrasound check is increased by 2 times per pregnancy.
Pregnant women in the two groups performed an average of 2.7 and 5.1 B -ultrasounds before childbirth, accounting for 53%and 47%of the total number of inspections, respectively.The researchers compared the various ending indicators of the two groups of pregnant women and fetuses, including the internal palace, premature birth, low birth weight, newborn death, deformity, suffocation, infection, etc.
The results of the study showed that increasing B -ultrasound inspection did not significantly improve the end of the fetus, nor did it increase the risk of adverse events.There is no statistical difference between the two groups on various indicators, indicating that the B -ultrasound is safe for the fetus, but there is no additional benefits.
Researchers believe that this result supports the number of B-ultrasound (1-2 times) recommended by WHO’s recommended pregnancy, and it is suggested that in areas with limited resources in areas, those pregnant women who are most needed for B-ultrasound, such as bleeding, pain, hypertension, hypertension, hypertension, high blood pressurePregnant women with abnormal situations.
This test is by far the largest, most systematic, and most authoritative research on B -ultrasound on fetal safety, and provides strong evidence and conclusions for B -ultrasound examinations during pregnancy.The results of the trial have been published in the magazine of "Liuye Knife · Global Health" and have been widely recognized and affirmed by international colleagues.
Of course, this does not mean that there is no precautions for pregnancy to do vagina.First of all, pregnant women have to obtain the consent of the doctor before doing the vaginal B super, and check in accordance with the doctor’s instructions.Secondly, pregnant women should keep relaxing and cooperative when doing vaginal B to avoid excessive tension or resistance.If you feel unwell or have any adverse reactions, tell your doctor in time.
Finally, pregnant women should pay attention to personal hygiene after completing the vaginal B -ultrasound, clean the vulva in time, and observe whether there are abnormal conditions, such as bleeding, increased secretions, and odor. If so, seek medical treatment in time.
This question does not have a fixed answer, because different expectant mothers may need to do different times and different types of B -ultrasound according to their physical condition and the development of the fetus.
Generally speaking, healthy expectant mothers need to conduct at least two B -ultrasound during pregnancy, and once in 20 to 24 weeks of pregnancy. This is a very important examination, mainly to check whether the fetus has obvious structural malformations, such as the heart of the heart, such as the heart of the heart, Whether the brain, spine, limbs and other organs develop normally.
The other time is 32 to 34 weeks of pregnancy, mainly to monitor the growth and development of the fetus, such as whether weight, length, head circumference, abdominal circumference, etc. meet the gestational week; at the same time, it is necessary to observe whether the placenta, amniotic fluid, umbilical cord, etc. are normal.
In addition to these two necessary B -ultrasound examinations, some hospitals also suggested that expectant mothers do a B -ultrasound check each time and before childbirth.The former is mainly to determine the pregnancy week and due period, and the preliminary screening of fetal malformations to improve the detection rate of fetal chromosomal abnormalities; the latter is mainly to monitor the size, location, activity, etc.Childbirth method and timing.
In addition, according to the situation of pregnancy during pregnancy, doctors may ask expectant mothers to add B -ultrasound to eliminate or deal with abnormalities or dangerous conditions in the growth and development of the fetus at any time.For example, vaginal bleeding, threatened premature birth, abnormal fetal heart change, unclear fetal position, excessive or less amniotic fluid during pregnancy during multiple pregnancy and pregnancy may need to increase the number of B -ultrasound during pregnancy.
In short, there are no uniform standards to do several B -ultrasound during pregnancy, and decide on the specific situation of each pregnant woman and the guidance of the doctor.Generally speaking, at least three basic B -ultrasound checks, adding special B -ultrasound examinations when necessary, avoid excessive B -ultrasound checks when there is no need.This can ensure the safety of pregnancy and the health of the fetus.
Pregnancy is a special period for women to experience, and it is also a period of joy and expectation.During pregnancy, expectant mothers want to understand their physical condition and the development of the fetus in time to ensure the health of maternal and infants.
The B -ultrasound of pregnancy is a safe and effective way to check, which does not cause abortion and will not affect the healthy growth of the baby.However, pregnant women must follow the doctor’s advice and guidance when doing vaginal B time, and pay attention to self -observation and protection.If you have any questions or worry, you can consult your doctor at any time.
Reference materials:
[1] Will the vaginal B -ultrasound affect the fetus in the early pregnancy?".
Dingxiang Garden. 20120-04-03 [2] "About Vaginal B-ultrasound". Tencent News. 20122-06-21
