When a woman is in a special situation, she requires maximum attention from medical professionals. That is why often pregnant women are prescribed various procedures, such as, for example, ultrasound diagnostics. In this article, I want to understand such an abbreviation as KTR: what it is and how important these indicators are.
About the concept
Women in position undergo at least three ultrasounds for all nine months of gestation. And they know that in such a study, the doctor determines the various parameters of the baby, including its size. It is worth noting that for each period of the development of the embryo, certain indicators correspond, according to which the specialist can say whether the pregnancy is normal. How is such an abbreviation as KTR deciphered, what is it? This is the coccyx-parietal size of a child in the womb.
What is it for?
Why know these indicators? They are correlated with the body weight of the crumbs and due to this, the exact gestational age is calculated (taking into account, of course, the date of the last menstruation). So, KTR - what it is, sorted out. Now it is worth saying that these indicators are very important right up to the 11th week of pregnancy, sometimes up to the thirteenth. After this time, other indicators come to the fore by which it will be possible to determine how well the baby develops in the womb.
Methodology
How can a doctor make such measurements to find out the KTR of the fetus? What does this include? The medical worker will measure these parameters during a procedure such as an ultrasound scan. At the same time, neither the woman herself nor her child will feel anything at all. The doctor will measure the crumbs from the toe to the coccyx, correlate these indicators with the table and draw certain conclusions.
It is worth saying that the longer the gestation period, the greater the CTE of the embryo. What does it mean? It's simple: the child is growing, and its size is increasing. How will the doctor receive these numbers? He will need to scan the woman’s uterus in various projections, choose the one where the baby is better seen from the point of view of this measurement, and take measurements. If you imagine what the baby is at this time (a certain body in the form of a worm, which is slightly bent around), the question arises of how the doctor can correctly learn these parameters. Measurements should be taken at a time when the embryo is maximally expanded. Also, more accurate results are obtained at a time when the baby has the least physical activity.
Time
It is also important to say when these figures can be known. So, the ideal period for the first ultrasound, when it becomes known to the CTE of the fetus, is about the 11th week of a woman's pregnancy . It was at this time that the main assessment of fetal growth was carried out (the most important indicator during this diagnosis), and the work of his heart was also viewed. It is also important to say that it is thanks to these numbers that the gestational age can be specified. After all, before that it is very approximate, since it is based on simple calculations from the time of the last menstruation. Previously, a woman may be assigned an ultrasound diagnosis if there are some concerns of the doctor regarding the life and health of both the mother and the embryo.
Norm
Having understood the abbreviation KTR (what it is and why it is needed), it is also important to say about the normal indicators that should be obtained by this measurement. There are certain tables in which certain numbers are painted for each week. Referring to these indicators, you can find out if everything is in order with the crumbs. It is worth saying that before the sixth week of pregnancy, ultrasound is done quite rarely, so often the tables begin from the seventh week of the embryo's life. However, a 5-week-old child is answered with a size of 5 mm, and a six-week-old - 6 mm. But further, a similar trend will not be maintained, as the baby will grow and develop faster. Already at the seventh week the KTR of the baby should be approximately 10 mm, at the eighth - 16 mm, at the ninth - twenty-three. The deadline when the first ultrasound of a pregnant woman should be performed is the 14th week. At this time, the KTR of the embryo will be as much as 63 mm! Further, to find out this indicator is not so important (and doctors do not attach much importance to this), because completely different numbers will come to the fore.
Deviations up
So, in what KTR is, what it means, figured out, also examined the ideal indicators. But this, unfortunately, is far from always the case. Quite often, indicators deviate from normal in one direction or another. Generally speaking, too fast embryo growth may indicate that the baby will be large and can weigh up to 4 kg during childbirth. It may also indicate that the gestational age was initially set incorrectly.
Downward deviations
What indicators can a pregnant woman know when doing an ultrasound? KTR. What this is is understandable. Coccyx-parietal size. However, sometimes there are situations that the numbers are slightly lower than those indicated in the table. What can it talk about? Firstly, again about the fact that initially the wrong gestational age was set. Do not be afraid, this often happens in the early stages, and later these figures can be adjusted. If the embryo does not grow, this can also indicate that the fetus froze in its development, that is, it died (this can be easily determined by the presence or absence of heart contractions, as well as by the movements of the child).
There are frequent situations when hormonal insufficiency of the mother causes a miscarriage. Various infectious diseases that can be in the mother's body can disrupt the growth and development of the fetus . This is also worth knowing. An embryo can develop too slowly even if it has certain genetic diseases. For example, Down's disease, Patau, Edwards. Diseases of the woman’s internal organs, cardiovascular problems, as well as thyroid dysfunction can also affect the baby’s growth in the womb. Well and the last, why the child can develop too slowly in the womb, are various disorders of the uterine mucosa, which can occur as a result of previous abortions.