- ultrasound during pregnancy - can help or hurt?
- breakdown trimester
Since its introduction in the late 1950's ultrasonography has become a very useful diagnostic tool in obstetrics.The currently used devices known as scanners real time with them on the monitor screen can see the movement of the fetus.This usually applies sound waves of very high frequency - between 3.5 to 7.0 megahertz.
These sound waves radiating transducer that is moved by the mother's abdomen;during this procedure, you can see everything that is in the womb.Reflections rays arrive at the same inverter.
information obtained from different reflections of the image on the monitor screen.With such a study can determine fetal heart rate, see the developmental defects.Ultrasound during pregnancy is an important procedure for the assessment of gestational age, the size and growth of the fetus.
In early pregnancy ultrasound is often recommended to do a full bladder Urinary bladder - structure and fu
Why use ultrasound during pregnancy
Currently, the US is considered a safe, non-invasive, precise and relatively inexpensive method of investigation of the fetus.Now the US has become an indispensable tool gynecologists, and plays an important role in taking care of every pregnant woman.
Main applications ultrasound:
- Diagnosis and confirmation of early pregnancy
fertilized egg can be seen already in the fifth week of pregnancy.In the sixth week, the embryo can already be seen and to determine its size.Ultrasound also allows you to determine the location of the pregnancy in the uterus.
- Vaginal bleeding in early pregnancy
Vaginal bleeding in early pregnancy ultrasound may help to establish the viability of the fetus.The heartbeat is determined already at 6-7 weeks;if it is found that, even though the vaginal bleeding, the probability of continuing pregnancy is 95%.In addition, ultrasound allows you to set the death of the fetus, even in the early stages.
heart rate of the fetus in the earliest stages of pregnancy often changes.The normal heart rate is considered to be the sixth week of 90-110 beats per minute, and at the ninth week - 140-170 beats per minute.Bradycardia 5-8 week (heart rate less than 90 beats per minute) is associated with a high risk of miscarriage Miscarriage - whether it can be insured? .
- Determination of gestational age and fetal size
body size of the fetus allows you to draw conclusions about the gestational age of the fetus.This is especially true at the beginning of pregnancy.If it is impossible to ascertain the date of the last (pre-pregnancy) monthly, ultrasound in the early stages would allow very accurately determine the gestational age.Determining the size of the body of the fetus in the later stages allows us to establish whether normally passes its development.
- diagnosis of fetal malformations
Many structural abnormalities of the fetus can be detected by ultrasound;they are usually unable to diagnose before the 20th week of pregnancy.Among the possible abnormalities in the fetus: hydrocephalus, anencephaly, dwarfism, spina bifida, gastroschisis, duodenal atresia, hydrops.The most modern equipment allows the relatively early stages of pregnancy to identify violations such as cleft palate (cleft palate), and congenital heart disease Heart defects - time heals? .
addition, ultrasound can be used to detect Down's syndrome, as well as in the prenatal diagnosis of many other disorders.
- Localization placenta
ultrasonography to determine the location of the placenta and thus diagnose or rule out placenta previa.
- Multiple pregnancy
ultrasound is indispensable to determine the amount of fruits, as well as evaluation of their development and the identification of various anomalies.