Introduction 264The nuchal scan 266Management 268Nuchal translucency describes sonolucent tissue in the posterior aspect of the fetal neck; the size can be measured with accuracy during the 1st trimester of pregnancy and an increase in the measurement is associated with an increased risk of chromosomal abnormality. If fetal karyotype is normal: ...

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	0
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Average
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Average
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Average