Table 2.

Clinical outcomes of patients in frozen-thawed ET cycles

Variables		Thawed cleavage-stage group (n=110)	Post-thaw extended culture blastocysts group (n=72)	P value
Duration of cryostorage (days)		316.85 ± 39.59	371.79 ± 43.69	0.352
Basal hormone levels on day 3
	LH (mIU/mL)	5.00 ± 0.23	5.75 ± 0.4	0.244
	FSH (mIU/mL)	5.90 ± 0.2	5.95 ± 0.22	0.848
No. of embryos transferred		2.38 ± 0.05	2.21 ± 0.05	0.016
Quality of embryos transferred
	Excellent	1.08 ± 0.09	1.28 ± 0.08	0.126
	Good	1.05 ± 0.09	0.71 ± 0.09	0.009
	Fair	0.28 ± 0.05	0.21 ± 0.05	0.341
Assisted hatching
	Yes	23 (20.91)	54 (75.00)	<0.001
	No	87(79.09)	18 (25.00)
Maximum oestradiol dose
	4–8 mg	109 (99.09)	72 (100.00)	0.417
	>8 mg	1 (0.91)	0 (0.0)
Endometrial thickness: progesterone day injection (mm)		9.45 ± 1.27	9.42 ± 1.62	0.859
Endometrial thickness: ET day (mm)		9.74 ± 1.65	9.57 ± 1.52	0.569
Difficulty of ET
	Easy	104 (94.55)	70 (97.22)	0.506
	Difficult	6 (5.45)	2 (2.78)

Data are written as mean ± SD or n (%). P value was obtained by the independent sample t test and chi-square test or Fisher’s exact test. Statistically significant level was 0.05. LH; Luteinizing hormone, FSH; Follicle-stimulating hormone, and ET; Embryo transfer.