Table 2.

Clinical outcomes in the stimulation and minimal stimulation groups

	Stimulation group	Minimal stimulation group
Number of cycles scheduled to receive OPU	1666	1879
Number of cycles resulted in no usable oocytes, n (%)	118 (7.1)	920 (49.0)*
Cancelation of OPU, n (%)	48 (2.9)	580 (30.9)*
Retrieval of degenerated oocyte, n (%)	44 (2.6)	142 (7.6)*
No oocyte to retrieve, n (%)	26 (1.6)	198 (10.5)*
Number of retrieved oocytes (mean ± SD)	4.2 ± 1.8	1.2 ± 0.3*
Number of fresh embryo transfer cycles, n	1.285	543
Number of clinical pregnancy, n	164	59
Clinical pregnancy rate per OPU, %	9.8	3.1

OPU, oocyte pick‐up.

vs stimulation group, P < 0.01.