![Cell-free fetal DNA versus maternal serum screening for trisomy 21 in pregnant women with and without assisted reproduction technology: a prospective interventional study | Genetics in Medicine Cell-free fetal DNA versus maternal serum screening for trisomy 21 in pregnant women with and without assisted reproduction technology: a prospective interventional study | Genetics in Medicine](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fgim.2018.4/MediaObjects/41436_2018_215_Fig1_HTML.jpg)
Cell-free fetal DNA versus maternal serum screening for trisomy 21 in pregnant women with and without assisted reproduction technology: a prospective interventional study | Genetics in Medicine
![First Trimester Maternal Serum Screening Using Biochemical Markers PAPP-A and Free β-hCG for Down Syndrome, Patau Syndrome and Edward Syndrome | SpringerLink First Trimester Maternal Serum Screening Using Biochemical Markers PAPP-A and Free β-hCG for Down Syndrome, Patau Syndrome and Edward Syndrome | SpringerLink](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs12291-012-0269-9/MediaObjects/12291_2012_269_Fig1_HTML.gif)
First Trimester Maternal Serum Screening Using Biochemical Markers PAPP-A and Free β-hCG for Down Syndrome, Patau Syndrome and Edward Syndrome | SpringerLink
![IJMS | Free Full-Text | Biochemical Screening for Fetal Trisomy 21: Pathophysiology of Maternal Serum Markers and Involvement of the Placenta IJMS | Free Full-Text | Biochemical Screening for Fetal Trisomy 21: Pathophysiology of Maternal Serum Markers and Involvement of the Placenta](https://pub.mdpi-res.com/ijms/ijms-24-07669/article_deploy/html/images/ijms-24-07669-ag-550.jpg?1682240800)
IJMS | Free Full-Text | Biochemical Screening for Fetal Trisomy 21: Pathophysiology of Maternal Serum Markers and Involvement of the Placenta
![Maternal serum screening markers and nuchal translucency measurements in in vitro fertilization pregnancies: a systematic review. | Semantic Scholar Maternal serum screening markers and nuchal translucency measurements in in vitro fertilization pregnancies: a systematic review. | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/34d2f753f6b382aa6256cdef236bf5e275b03338/5-Table3-1.png)