From: Sperm quality and paternal age: effect on blastocyst formation and pregnancy rates
Sperm concentration (M/ml) | Conc < 0.2 | 0.2 < Conc < 5 | 5 < Conc < 15 | Conc > 15 | P value |
---|---|---|---|---|---|
Mean maternal age (years ± SD) | 32.97 ± 5.05 | 31.98 ± 5.11 | 32.81 ± 5.05 | 33.94 ± 4.83 | 0.6257 |
Number of ICSI | 282 | 373 | 326 | 651 | |
Mean number of injected oocytes ± SD | 8.04 ± 4.52 | 8.50 ± 4.80 | 7.81 ± 4.29 | 7.28 ± 4.24 | 0.0007 |
Fertilization rate (%) | 58.29 | 61.87 | 65.30 | 68.95 | <0.0001 |
Mean number of embryos at day 2 ± SD | 4.40 ± 3.30 | 5.04 ± 3.70 | 4.97 ± 3.56 | 4.81 ± 3.55 | 0.1515 |
Mean number of embryos at day 3 ± SD | 4.03 ± 3.39 | 4.21 ± 3.51 | 4.25 ± 3.30 | 4.17 ± 3.33 | 0.7636 |
Mean number of embryos in prolonged culture ± SD | 2.15 ± 2.93 | 2.78 ± 3.50 | 2.77 ± 3.43 | 2.73 ± 3.23 | 0.0562 |
Mean number of obtained blastocysts ± SD | 0.84 ± 1.63 | 1.32 ± 2.15 | 1.44 ± 2.10 | 1.36 ± 2.07 | 0.0014 |
Rate of blastocyst formation (%) | 39.17 | 47.49 | 51.88 | 49.69 | <0.0001 |
Mean number of transferred blastocysts ± SD | 0.035 ± 0.185 | 0.042 ± 0.228 | 0.092 ± 0.300 | 0.093 ± 0.307 | 0.3593 |
Mean number of frozen blastocysts ± SD | 0.344 ± 0.980 | 0.592 ± 1.230 | 0.610 ± 1.400 | 0.516 ± 1.210 | 0.1113 |
Rate of useful blastocysts (%) | 45.155 | 48.07 | 48.93 | 44.96 | 0.4562 |
Rate of clinical pregnancies (%) | 35.30 | 41.30 | 39.60 | 37.60 | 0.4980 |
Rate of miscarriages (%) | 22.70 | 9.60 | 14.90 | 21.00 | 0.1572 |