Table 3. Pregnancy rate in relation to mild α-chymotrypsin treatment of semen samples (in % per fresh embryo transfer procedure).

Parameter	Study group (41 embryo transfer procedures)	Control group (66 embryo transfer procedures)	P value*
Clinical pregnancy rate (%)	29.26	27.27	0.825
Biochemical pregnancy rate (%)	9.75	9.09	0.872

*, t-test, n=107 samples.