. 2014 Jul 24;3(3):809–837. doi: 10.3390/jcm3030809

Table 7.

Prevalence of mosaic trisomy 2 in chorionic villi and UPD2 in the fetus.

Study	Total No. of CVS sample	No. of CVS samples with trisomy 2	Prevalence of trisomy 2 in CV		No. of TFM with trisomy 2 after a mosaic in CV	No. of cases with UPD investigation	No. of UPD2 retrieved	Incidence of UPD in mosaic trisomy 2 in CV (%)
Study	Total No. of CVS sample	No. of CVS samples with trisomy 2	%	1/x	No. of TFM with trisomy 2 after a mosaic in CV	No. of cases with UPD investigation	No. of UPD2 retrieved	Incidence of UPD in mosaic trisomy 2 in CV (%)
Wolstenholme, 1996	66,129	41	0.06	1613	na	na	na	na
Hahnemann and Vejerslev, 1997	92,246	11	0.01	8386	0	na	na	na
Sago et al., 1997	10,500	11	0.10	955	na	11	0	0
Sifakis et al., 2010	37,474	45	0.12	833	0	43	0	0
Present Study *	52,673	74	0.14	712	0	62	0	0
Total	259,022	182	0.07	1423	0	116	0	0

* Including cases published in Grati et al., 2006; na = not available.