Table III.

Endometrial thickness, morphology, and blood flow following treatment with the two protocols.

Endometrial characteristics	Ultra-long protocol (n=75)	Long protocol (n=72)	P-value
Day of hCG administration
Endometrial thickness (mm)	2.67±1.67	11.78±2.30	0.0092
Endometrial morphology (%)
A	32.0 (24/75)	23.6 (17/72)	0.257
B	57.3 (43/75)	43.1 (31/72)	0.083
C	10.7 (8/75)	33.3 (24/72)	0.001
Endometrial blood flow (%)
A	50.7 (38/75)	36.1 (26/72)	0.075
B	49.3 (37/75)	56.9 (41/72)	0.278
C	0 (0/75)	6.9 (5/72)	0.020
Day of ET
Endometrial thickness (mm)	12.91±2.01	11.97±2.85	0.0226
Endometrial morphology (%)
A	0 (0/75)	0 (0/72)	1.000
B	0 (0/75)	0 (0/72)	1.000
C	100 (75/75)	100 (72/72)	1.000
Endometrial blood flow (%)
A	32.0 (24/75)	23.6 (17/72)	0.257
B	49.3 (37/75)	37.5 (27/72)	0.148
C	18.7 (14/75)	38.9 (28/72)	0.007

hCG, human chorionic gonadotropin; ET, embryo transfer.