How many weeks of pregnancy can do down's screening

summary

Many pregnant mothers don't know the time of Down's screening. All of a sudden, one day I remembered that I didn't do down's screening, so I began to worry that I missed the time of Down's screening. So, how many weeks of pregnancy do you need down's screening.

How many weeks of pregnancy can do down's screening

First: and Down's screening is an effective means to prevent congenital fool. During pregnancy, other routine tests (such as B-mode ultrasound) are difficult to find Down syndrome. Once the Down's baby is born, it will cause a long-term heavy burden on individuals, families and society.

Second: under normal circumstances, pregnant women can know the screening results 2-3 weeks after blood sampling. If the test results show that alpha fetoprotein (AFP) is 70% of normal pregnant women, the level of free - β - subunit - human chorionic gonadotropin (free hCG β) is ankylosing, and the probability of having a congenitally stupid fetus is very high, amniotic fluid examination is needed to make a clear diagnosis. But pregnant mother also need not worry, the doctor will take corresponding intervention measures according to your situation.

Third: before the examination, pregnant women need to provide more detailed personal information, including date of birth, last menstruation, weight, whether insulin-dependent diabetes, singleton or twins, whether smoking, abnormal pregnancy history, etc. Because these data play an important role in the risk rate statistics of screening, pregnant mothers must be serious and realistic when filling in the test sheet.

matters needing attention

Well known obstetrics and gynecology hospital obstetrics and Gynecology experts said that in pregnancy will do two down's screening, one is in the early pregnancy, one is in the second trimester. Through the extraction of maternal serum, detection of maternal serum alpha fetoprotein, chorionic gonadotropin and free estriol concentrations, combined with the expected date of delivery, weight, age and gestational age at the time of blood collection, accurately calculate the incidence of congenital defects.