If it is not a close relative to marriage, B-ultrasound examination in ordinary pregnant women is an important means to detect fetal malformations. Generally, B-ultrasound can be screened at 18-20 weeks of pregnancy, because at this time, the various organs of the fetus have developed and formed.
It is easy to see if there are deformities, such as digestive tract deformities, neural tube deformities, such as brainless children, spina bifida, etc. Using a clearly distinguished B ultrameter, small limb deformities in the fetus, such as cleft lip and palate deformities, etc.!
However, B-ultrasound is used to check for deformities, and other hidden methods are required.
Of course, Yun Hanxiao had undergone color ultrasound at Situ's family, and there was no deformity in the appearance of the baby. Di Shajie also asked Yun Hanxiao to do a Tang family screening at Situ's family!!
Down screening is a type of pregnancy screening that can detect the concentration of type A fetal protein and villous gonadotropin in the maternal serum, and combine the pregnant woman's expected delivery date, age, weight and gestational week at the time of blood collection, etc. to calculate the birth of Down's baby.
The detection method of risk coefficient. The screening results were normal at that time.[
However, Tang Screening is used to detect dementia, with an accuracy rate of only 70%-80%, and the accuracy rate of amniocentesis is more than 99%! However, the former is relatively less harmful to pregnant women. The latter is called invasive examination.
There are 3 different methods for invasive examination. The method of taking a small amount of villus samples from the placenta is called villus sampling. The method of taking a small amount of amniotic fluid from the uterine cavity for detection is called amniotic cavity puncture. And from the umbilical cord
The method of taking some fetal blood for detection is called umbilical cord puncture. If you are not careful, it may cause the fetus to slip.
Therefore, ordinary pregnant women do the first two things, and if they have any questions, they have to do the following methods.
The female doctor's technique is very light and agile. That kind of hand speed is a talent, and it is also one of the reasons why Di Shajie must use this female doctor. She is indeed a genius in this field, but she is more willing to use her brain.
She doesn't work with both hands. She likes forensics, so she abandons obstetrics and gynecology.