Table 1.

Differentially Methylated Regions in Placental Compared with Whole Blood DNA Samples Across Chromosomes 13, 18, 21, X, and Y

CHR*	Trimester	No. of hyper†	No. of hypo‡	Total no.	% Of hyper§	% Of hypo¶
13	First	1310	1336	2646	49.5	50.5
13	Third	1311	1318	2629	49.9	50.1
18	First	1967	1888	3855	51.0	48.9
18	Third	1957	1944	3901	50.2	49.8
21	First	1063	1015	2078	51.1	48.8
21	Third	1042	1040	2082	50.0	49.9
X	First	1992	1951	3943	50.5	49.5
X	Third	1995	1989	3984	50.1	49.9
Y	First	1192	1120	2312	51.6	48.4
Y	Third	1986	1990	3976	49.9	50.0

^*Chromosome. 

^†Number of hypermethylated regions. 

^‡Number of hypomethylated regions. 

^§Percentage of hypermethylated regions. 

^¶Percentage of hypomethylated regions.