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Q我现在怀孕17周了,12周的时候做了NT检查,顺利通过了,本想这周打算去做唐筛检查,但是医院要求先做B超,然后再抽血。我问了身边好多人做唐筛都不需要照B超的。我应该怎么做呢?A唐氏筛查主要是多因素风险分析。其中三项血清学指标:人绒毛膜促性腺激素、游离雌三醇、胎甲球蛋白都与孕龄密切相关,在月经周期规律的情况下,如果受孕日期不是常规排卵日,就可能导致唐氏筛查风险值产生很大误差,因此,如果月经周期不规
Q I am now pregnant for 17 weeks. At 12 weeks, I did an NT examination and passed smoothly. I wanted to do a Tang screening this week, but the hospital asked to do a B- and then take a blood. I asked a lot of people do not need to follow the B-screen sieve. What should I do? A Down’s screening is mainly a multi-factor risk analysis. Three of these serological indicators: human chorionic gonadotropin, free estriol, fetal globulin and gestational age are closely related to the menstrual cycle in the case of law, if the date of conception is not the conventional ovulation day, it may lead to Tang The risk of screening for screening results in a large error, so if the menstrual cycle is irregular