Table 3.

Clinical pregnancy rates per cycle according to method applied for timing insemination or intercourse (hCG-only, hCG plus LH-surge or LH-surge-only) among the different ovarian stimulation protocols. Results are expressed as rate (number of pregnancy cycles/total number of cycles).

	HCG-only (group 1)	hCG + LH-surge (group 2)	LH-surge-only (group 3)	All Cycles
All stimulation cycles	10.2% (109/1068)	14.3% (69/483)	2% (5/256)	10.7% (183/1707)
CC	6.3% (34/539)	15.9% (20/126)	1.9% (2/106)	7.3% (56/771)
CC+FSH	15% (16/108)	30% (6/20)	0 (0/4)	16.7% (22/132)
Letrozole	9% (6/66)	20.3% (14/69)	9% (1/11)	14.4% (21/146)
Letrozole+FSH	17% (14/82)	17.2% (8/58)	0 (0/3)	17.5% (22/143)
FSH	14% (39/273)	10% (21/210)	6.3% (2/32)	12.2% (62/515)
No medication	6.5% (5/78)	12.7% (8/65)	8.8% (13/150)	8.9% (26/293)