Table 1.

Distribution and Comparison of Intervillous Blood Flow Detection in 65 Normal and 65 Abnormal Early Pregnancies at 8 to 9 Weeks (25 Pairs), 10 to 11 Weeks (20 Pairs), and 12 to 13 Weeks (20 Pairs)

Gestational age (weeks)	Normal			Abnormal
	C	P	C & P	C	P	C & P
8 to 9	1	5	3	9	1	12
10 to 11	2	7	3	4	2	14
12 to 13	3	7	8	2	1	8

C, Center only; P, periphery only.