Hello doctor! I am currently 12 weeks pregnant, and the nuchal translucency is 3.4mm. Doctor, can you tell me if a 12-week-old fetus has a nuchal translucency of 3.4mm? Can I do a 24-chromosome test now or do I have to do an amniocentesis at 17 weeks to be accurate? I look forward to your advice, thank you!

Pregnancy check-up at the 12th week of pregnancy is the “golden milestone” that helps doctors check the development of the fetus and detect abnormalities early. One of the techniques that support fetal monitoring is ultrasound. So is a 12-week ultrasound really necessary?