B-ultrasound examination is usually more common in gynecological routine examinations. B-ultrasound can check whether pregnant women have stopped menstruating, whether there are developmental abnormalities in the size, position, and shape of the uterus and ovaries, whether there are tumors, and the relationship between tumors and the uterus and ovaries; Can detect any abnormal fluid accumulation in the pelvic cavity and foreign objects in the uterine cavity. Can pregnancy signs be seen on ultrasound after 40 days of amenorrhea?
What can be seen on ultrasound after 40 days of amenorrhea
Generally speaking, getting an ultrasound after 40 days of amenorrhea may not show much because the gestational sac can only be seen after 6-7 weeks of pregnancy. Under normal circumstances, in the early stages of pregnancy (around 12 weeks), expectant mothers should undergo a B-ultrasound examination. Pregnant women should avoid undergoing ultrasound too early or multiple times. Performing ultrasound too early may cause the fragile and newly formed embryo to shake, which is not conducive to embryo development. Early pregnancy ultrasound is performed to determine whether pregnancy has occurred and the duration of pregnancy, provide reliable evidence for determining the due date, and promptly detect any abnormalities in embryonic development.
The second B-ultrasound examination is usually scheduled in mid pregnancy (around 20 weeks of pregnancy), when there is relatively more amniotic fluid in the uterus, the size of the fetus is moderate, and there is a large space for movement in the uterus. For B-ultrasound examination, there is good contrast and various organs of the fetus can be clearly seen. More obvious deformities, such as congenital heart disease, anencephaly, hydrocephalus, spina bifida, abdominal wall defects, short limbs, polycystic kidney disease, gastrointestinal atresia, etc., are easily detected. If necessary, timely treatment or termination of pregnancy can be carried out.
The third B-ultrasound examination should be scheduled in the late stage of pregnancy (around 28 weeks of gestation), mainly to understand the fetal development in the uterus and to re-examine the fetus for any abnormalities. Because some diseases may not be detected in a timely manner by ultrasound examination during mid pregnancy.
If women are in a hurry to test for pregnancy, they can use early pregnancy test strips. If the test strip is weakly positive, it can prove pregnancy. Otherwise, there is no pregnancy.
Does early pregnancy ultrasound have an impact on the fetus
The ultrasound probe used nowadays emits sound intensity less than 10 milliwatts per square centimeter, and the ultrasound examination time is often only 5-10 minutes, with shorter detection time for each organ. So, the harm of B-ultrasound examination to the fetus is minimal and will not affect the physical and mental development of the fetus. Therefore, pregnant women do not need to have a fear of prenatal ultrasound examination. Timely ultrasound examination is an important means to ensure the normal development of the fetus.
Reminder: 1. If the pregnant mother has not given birth within two weeks of the due date, the doctor may recommend another ultrasound to understand the placenta, amniotic fluid, fetal position, and other conditions, which can help the doctor decide which delivery method is safe. 2. If the pregnant mother suffers from certain diseases, B-ultrasound examination is more important. The frequency and timing of ultrasound examinations during pregnancy should be arranged by the doctor according to the pregnancy situation.
