Clinical and Structural Features of Sperm Head Vacuoles in Men Included in the In Vitro Fertilization Programme

Table 5

Correlation between sperm head vacuoles (“good sperm”: Class I plus Class II; “bad sperm”: Class II plus Class IV) and outcome of in vitro fertilization (fertilization and blastocyst rates) according to the method of in vitro fertilization.

	Correlations
	Method	I plus II	III plus IV
Spearman's; rho	IVF
	Fertilization rate
	Correlation coefficient	,358*	−,358*
	Significance (2-tailed)	,041	,041
	𝑁	33	33
	Blastocyst rate
	Correlation coefficient	,261	−,261
	Significance (2-tailed)	,207	,207
	𝑁	25	25
	ICSI
	Fertilization rate
	Correlation coefficient	−,050	,048
	Significance (2-tailed)	,738	,747
	𝑁	48	48
	Blastocyst rate
	Correlation coefficient	−,041	,042
	Significance (2-tailed)	,809	,805
	𝑁	37	37

∗Correlation is significant at the 0.05 level (2-tailed).
IVF: classical in vitro fertilization; ICSI: intracytoplasmic sperm injection.