Trisomy 21, 12 weeks Francesco Contarin, MD Article Published: Jan 15, 2003 Venezuela This 42-year-old woman (G3 P1C1) was scanned at 12 week. The fetus has a large nuchal lucency. The karyotype returned 47,XX +21. There are 2 short videos of the fetus: scan through & 3D reconstruction  The embryo: Discussion Board Start a discussion about this article Add bookmark Bookmarked