Table 2.

Pregnancy outcomes of patients in FET cycles

Variable	Extended culture	Control	P
No. of warming cycles	193	322
No. of embryos warmed	429	701
No. of surviving embryos (%)	417 (97.20)	672 (95.86)	0.242
No. of cycles canceled (%)	1 (0.52)	4 (1.24)	0.655
No. of ET cycles	192	318
No. of embryos transferred	417	672
Mean no. of embryos transferred	2.17 ± 0.53	2.11 ± 0.47	0.206
No. of high-quality embryos (% number of embryos transferred)	350 (83.93)	539 (80.21)	0.123
No. of embryos transferred with good developmental potential	254 (60.91)
Endometrial preparation protocols			0.289
Natural cycles (%)	132 (68.75)	204 (64.15)
Artificial cycles (%)	60 (31.25)	114 (35.85)
Endometrial thickness (mm)	10.38 ± 1.77	10.62 ± 1.89	0.150
No. of clinical pregnancies (% ET cycles)	111 (57.81)	160 (50.31)	0.100
No. of implantations (%)	147 (35.25)	201 (29.91)	0.066
No. of multiple pregnancies (% clinical pregnancy)	36 (32.43)	41 (25.63)	0.222
No. of ectopic pregnancies (% clinical pregnancy)	6 (5.41)	3 (1.88)	0.167
No. of abortions (% clinical pregnancy)	13 (11.71)	34 (21.25)	0.041
No. of deliveries	92	124
No. of live birth cycles (% ET cycles)	92(47.92)	122(38.36)	0.034