Table 6 Effects of paternal age in ICSI

Mean maternal age (years ± SD)

27.54 ± 4.55

32.69 ± 4.12

36.72 ± 3.95

36.53 ± 4.90

<0.0001

Number of ICSI

226

949

410

47

Mean number of injected oocytes ± SD

8.69 ± 4.27

7.89 ± 4.53

7.15 ± 4.36

7.32 ± 3.82

<0.0001

Fertilization rate (%)

61.05

65.20

64.57

70.35

0.0007

Mean number of embryos at day 2 ± SD

5.11 ± 3.58

4.92 ± 3.60

4.46 ± 3.45

4.74 ± 3.09

0.0400

Mean number of embryos at day 3 ± SD

4.24 ± 3.28

4.27 ± 3.48

3.88 ± 3.18

4.32 ± 3.30

0.3273

Mean number of embryos in prolonged culture ± SD

2.89 ± 3.51

2.73 ± 3.29

2.35 ± 3.20

2.45 ± 2.86

0.0821

Mean number of obtained blastocysts ± SD

1.46 ± 2.39

1.31 ± 2.00

1.10 ± 1.91

1.13 ± 1.94

0.1376

Rate of blastocyst formation (%)

50.38

48.11

46.99

46.09

0.5682

Mean number of transferred blastocysts ± SD

0.044 ± 0.227

0.077 ± 0.282

0.076 ± 0.274

0.064 ± 0.247

0.8895

Mean number of frozen blastocysts ± SD

0.619 ± 1.300

0.544 ± 1.170

0.410 ± 1.250

0.617 ± 1.410

0.0069

Rate of useful blastocysts (%)

45.59

47.27

43.93

60.38

0.1271

Rate of clinical pregnancies (%)

41.50

41.00

32.10

28.20

0.0162

Rate of miscarriages (%)

17.40

14.60

20.70

45.50

0.3510