During an ultrasound examination inMandatory determine the various sizes of the fetus, which characterize how much the fetus is formed. Each period of gestation corresponds to a certain size, changing them in the direction of increase or decrease makes you think about the pathological course of pregnancy. In this article we will consider what is the coccyx-parietal size of the fetus, what does it say and how should it be normal?
What is the CTE of the fetus?
The coccyx-parietal fetal size is determined whenUltrasound study and comparing it with the body weight of the fetus, determine the duration of pregnancy and compare it with the period calculated by the last menstruation. This indicator has an important diagnostic value before the eleventh week of pregnancy (in some cases before the thirteenth week), after which the definition of other fetal sizes will come first. The method of measuring the coccygeal-parietal size of the fetus is quite simple, and consists in determining the distance from the parietal bone to the coccyx. It was noted that the indicator of the coccygeal-parietal size is directly proportional to the gestation period, that is, the longer the period, the higher the KTR index.
Ultrasound of the fetus - KTR
To determine the coccygeal-parietal size by ultrasoundIt is necessary to scan the uterus in various projections and find one on which the length of the embryo will be greatest. On this scan, you should determine the coccygeal-parietal size. Due to the determination of the coccygeal-parietal fetal size by ultrasound, the estimated date of delivery is established.
Coccygeal parietal size - norm
To be precise, does theEmbryo gestation period developed and compiled tables, which indicate the duration of pregnancy corresponds to a certain value of coccygeal-parietal size. Thus, the CT of the fetus of 5 mm corresponds to the 5th week of pregnancy, and the CT of the fetus of 6 mm corresponds to the sixth week of pregnancy. If we follow this indicator further, we can see another trend. Thus, the CTE of the fetus at 7, 8 and 9 weeks of gestation is 10 mm, 16 mm and 23 mm, respectively. A KTR fetus 44 mm is observed in normal at 11 weeks of gestation. If, for example, at 12 weeks of gestation, the size of the feces of the coccygeal parietal is 52 mm, and at week 13 it corresponds to 66 mm, this indicates an accelerated growth of the embryo.