Ultrasound of the cervix during pregnancy: how do ultrasound
Ultrasound examination of internal organs has become one of the most important techniques for diagnosis of various diseases of the abdominal cavity, joints. In addition, it is impossible to imagine pregnancy without defining pathologies of the fetus and the General condition of the uterus.
Why do I need to do an ultrasound for pregnant women?
Planned tests administered three times during the whole period of pregnancy. This is necessary in order to accurately determine how the fetus, condition of the uterus and cervix, and to avoid possible complications. The procedure is administered in each trimester:
- 12 – 14 week;
- 18 – 21 weeks;
- 32 – 34 weeks.
Each period, of course, important for normal pregnancy. In the first trimester the doctors rule out the presence of abnormalities in the development of the embryo; in the second we look at the amount of amniotic fluid, the presence of bodies and the status of the cervix, as well as the diligence of the placenta. The third condition of the placenta, the degree of maturation of the cervix and its length.
In the first trimester a transvaginal study performed. To do this, special ultrasonic transducer inserted into the vagina. In this way check:
- Shape and size;
- The density of the myometrium and its integrity;
- Permeability and axial parameters.
Further research is carried out transabdominally, applying a layer of conductive gel on the stomach. At small time in preparing for this study, patients will be asked to drink a liter of non-carbonated liquid for a better view.
It is important during ultrasound to determine the condition of the uterus, its size, and also to measure the length of the neck. Normal at different stages it will be like this:
- to 24 weeks – 3,5-4,5 cm;
- 25 – 28 week at least 3.5 inches;
- 32 – 36 week no less than 3 inches.
Length measurement of the cervix in early pregnancy is performed only for special reasons. Until 18 – 20 weeks its length is variable and can not be a criterion for diagnosis.
If the ultrasound shows abnormalities (less than 2.5 cm on the 21 – 28th week), threat of premature birth or miscarriage. To prevent this process, are assigned a special therapy for prolongation of pregnancy.
What activities can appoint to the small length of the uterus?
Ultrasound of the cervix during pregnancy is prescribed in order to ensure the normal condition of the tissues and the body’s ability to bear healthy offspring. During gestation, the cervix becomes hard and remains so almost until the birth. Along with hardening of the tissues in the lumen of the cervix forms a mucus plug to protect the uterus and fetus against the penetration of germs.
Assigning a routine ultrasound, the Ob / GYN wants to make sure that the cervix long enough for normal carrying a child.
If during the ultrasound the doctor will notice that the neck is shorter – is the main symptom of premature birth. Short, softened and ajar the cervix can’t hold the weight of the fetus and amniotic fluid. This condition is called isthmic-cervical insufficiency (ICN).
Risk factors ICN:
- injuries of the cervix (difficult birth, multiple abortions, and other instrumental interventions);
- operations on the cervix;
- anomalies of the body;
- hormonal disorders (hyperandrogenism);
- dysplasia of the connective tissue;
- features of pregnancy (multiple pregnancy, polyhydramnios, large fruit).
A woman could carry a child to term, the medical Council decides to impose seams on the outer mouth of the uterus. This preventative action reduces the load on the cervix and promotes proper gestation. Not to use the joints, doctors can impose a special plastic ring (obstetric pessaries), which performs the same function.