Table 1.

Patient and Cycle Characteristics by FET outcome

		Clinical pregnancy after FET, n=21	Not pregnant after FET, n=69	P value
Fresh	Age, yrs	32.7±3.7	33.6±4.3	0.43^a
cycle	FSH, mIU/ml	6.6±2.1	6.3±1.9	0.58^a
	E2 on the day of hCG, pg/mL	2543(2106–3989)	2555(1665–3354)	0.45^b
	E2 post hCG, pg/mL	3258(2546–4300)	3019(3076–4300)	0.62^b
	P on the day of hCG, ng/mL	1.5 (1.1–1.7)	0.8 (0.6–1.3)	<0.01^b ^d
	P post hCG, ng/mL	7.2 (4.2–9.9)	4.7 (2.7–6.5)	0.03^b ^d
	ICSI	10 (47.6)	35 (50.7)	0.80^c
	Oocytes retrieved	18.3±8.0	16.6±8.3	0.45^a
	Mature oocytes	15.7±7.0	13.7 ± 6.2	0.25^a
	Oocytes fertilized	12.5±5.1	10.3±4.0	0.05^a
	Embryos transferred	2.6±0.5	2.8±0.8	0.51^a
	Blastomeres per embryo transferred	8.1±0.5	8.1±0.8	0.90^a
	Embryos available on Day 3	10.5±3.7	8.6±3.0	0.02^a ^d
	Clinical pregnancy following fresh ET	15 (71.4)	28 (40.6)	0.01^c ^d
FET	Age, yrs	35.0±3.7	34.8±4.4	0.83^a
cycle	Endometrial thickness, mm	9.1 ±2.6	8.5±3.4	0.55^a
	Post-thaw blastomere survival, %	82.6±12.3	77.1±22.1	0.31^a
	Embryos transferred	3.0±0.6	2.8±0.8	0.38^a
	Blastomeres/ embryo transferred	6.7±1.9	5.9±1.6	0.08^a

Note: Continuous data are presented as means ± SD (if normally distributed) or as median (interquartile range) if skewed; categorical data are presented as n (%)

Student Test.;

Mann-Whitney;

chi square;

Denotes statistical significance