Effects of immediate versus delayed frozen embryo transfer in high responder patients undergoing freeze-all cycles

Table 3 Pregnancy outcomes of immediate FET^a and delayed FET^b groups in the entire cohort and propensity score-matched cohort

Pregnancy outcomes	Entire cohort (n = 2128)		P-value	Propensity score-matched cohort (n = 1366)		P-value
	Immediate FET^a	Delayed FET^b		Immediate FET^a	Delayed FET^b
	(n = 1130)	(n = 998)		(n = 683)	(n = 683)
Clinical pregnancy	61%	63.4%	0.244	413 (60.5)	434 (63.5)	0.242
Spontaneous abortion	12.6%	10.1%	0.065	79 (11.6)	84 (12.3)	0.676
Live birth	49.9%	49.2%	0.743	328 (48.0)	337 (49.3)	0.626

Abbreviations: FET, frozen embryo transfer
^aImmediate FET and ^bDelayed FET means FET took place either within the first menstrual cycle following oocyte retrieval or afterwards. Data are presented as number (%)

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