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Table 1 Effects of sperm concentration in IVF

From: Sperm quality and paternal age: effect on blastocyst formation and pregnancy rates

Sperm concentration (M/ml)

Conc < 15

Conc > 15

P value

Mean maternal age (years ± SD)

33.60 ± 4.51

34.36 ± 4.76

0.2235

Number of IVF

52

807

 

Mean number of inseminated oocytes ± SD

9.54 ± 5.30

9.83 ± 5.46

0.7268

Rate of fertilization (%)

60.08

66.95

0.7381

Mean number of embryos at day 2 ± SD

5.90 ± 4.56

6.84 ± 4.44

0.0702

Mean number of embryos at day 3 ± SD

5.42 ± 3.81

6.14 ± 4.13

0.1911

Mean number of embryos in prolonged culture ± SD

3.69 ± 4.20

3.87 ± 4.02

0.5102

Mean number of obtained blastocysts ± SD

1.94 ± 2.55

2.06 ± 2.59

0.6040

Rate of blastocyst formation (%)

52.6

53.07

0.9107

Mean number of transferred blastocysts ± SD

0.115 ± 0.323

0.104 ± 0.310

0.8808

Mean number of frozen blastocysts ± SD

1.02 ± 1.58

0.990 ± 1.780

0.7155

Rate of useful blastocysts (%)

58.42

53.22

0.0181

Rate of clinical pregnancy (%)

28.89

37.96

0.228

Rate of miscarriage (%)

30.77

21.80

0.3832

  1. Conc concentration, M/ml million per ml, SD standard deviation