| Table 2. Characteristics and outcomes of ICSI cycles. | |||||||
| Parameter | Abstinence period | p-value | |||||
|---|---|---|---|---|---|---|---|
| Group 1a (n=37) | Group 2a (n=170) | Group 3a (n=392) | Group 4a (n=253) | Group 5a (n=102) | Group 6a (n=49) | ||
| Semen volume (mL) | 2.6±1.4c | 2.9±1.5b | 3.4±1.5cb | 3.4±1.5cb | 3.6±1.5cb | 3.6±1.7c | <0.0001 |
| Total sperm count | 118±126c | 139±117b | 160±134 | 157±115 | 196±127 | 213±158cb | 0.005 |
| Sperm concentration | 46±41 | 52±37 | 49±30 | 50±32 | 49±30 | 61±36 | 0.1 |
| Total sperm motility (%) | 51±18 | 51±20 | 54±19 | 51±20 | 48±20 | 54±19 | 0.05 |
| Progressive motility of sperm (%) | 41±21 | 41±19 | 43±19 | 42±19 | 40±20 | 44±20 | 0.6 |
| Sperm morphology (%) | 1.8±2.3 | 2.1±2.0 | 2.3±2.0 | 2.2±1.9 | 2.6±2.2 | 2.2±2.0 | 0.2 |
| No. oocytes aspirated | 8.8±6.5 | 8.2±6.2 | 8.4±5.9 | 7.8±6.1 | 8.3±5.8 | 8.6±6.3 | 0.5 |
| No. oocytes injected | 6.8±5.3 | 6.4±4.8 | 6.6±4.9 | 6.3±5.1 | 6.4±4.1 | 6.9±5.4 | 0.8 |
| No. oocytes fertilized | 4.4±3.7 | 4.6±3.8 | 4.7±3.7 | 4.3±4.1 | 4.6±3.3 | 5.0±4.6 | 0.4 |
| No. embryos transferred | 1.6±0.5 | 1.9±0.4 | 1.8±0.5 | 1.9±0.4 | 1.9±0.5 | 1.7±0.5 | 0.03 |
| Fertilization rate (%) | 66±32 | 72±30 | 73±27 | 68±32 | 67±29 | 69±32 | 0.4 |
| Cleavage-stage embryo rate (%) | 89±29 | 91±25 | 92±22 | 91±23 | 92±24 | 93±16 | 0.8 |
| Biochemical pregnancy rate per embryo transfer N (%) | 8 (29.1) | 35 (29.4) | 90 (30.2) | 58 (30.0) | 24 (32.4) | 11 (27.8) | 0.9 |
| Clinical pregnancy rate per embryo transfer N (%) | 8 (29.2) | 30 (25.2) | 84 (28.1) | 52 (26.9) | 23 (31.1) | 11 (27.8) | 0.9 |
Data were presented as mean ± SD or frequency (percentage).
a The ICSI cycles were divided into six groups based on days of abstinence period: Group 1: 1 day abstinence, Group 2: 2 days abstinence, Group 3: 3 days abstinence, Group 4: 4 days abstinence, Group 5: 5 days abstinence, Group 6: 6-10 days abstinence
b,c Values with the same superscript in a row were significantly different.