Group A

Group B

P-value

No. of oocytes

387

424

?

Normal fertilization (%)

67.2 (260/387)

69.1 (293/424)

0.558

Polyspermy (%)

10.9 (42/387)

5.7 (24/424)

0.007

1PN (%)

1.3 (5/387)

2.4 (10/424)

0.260

High-quality embryo (%)

42.6 (112/263)

50.8 (152/299)

0.051

Available embryo (%)

66.2 (174/263)

71.6 (214/299)

0.166

No. of surplus embryos

151

147

?

Blastocyst formation (%)

16.6 (25/151)

25.9 (38/147)

0.049

High-quality blastocyst formation (%)

4.6 (7/151)

11.6 (17/147)

0.028