Table 3.

Ultrasound parameters of endometrial receptivity during mid-secretory phase for both pregnant and nonpregnant women in patients with UI

Pregnancy outcome of UI patients	Cases (n)	Endometrial thickness (mm)	UA-PI	E-mean (kPa)	VS-mean (m/s)
Nonpregnant	34	9.97 ± 1.44	2.92 ± 0.82	24.03 ± 5.77	2.90 ± 0.65
Pregnant	7	10.33 ± 0.75	2.80 ± 0.26	17.83 ± 7.15	2.39 ± 0.52
t/z		-0.635	-0.450	2.486	-2.201
p		0.529b	0.652a	0.017b	0.028a

^aMann-Whitney U test

^bStudent’s test

p < 0.05, indicating statistical significance