| Table 1. Demographic characteristics | ||
| Luteal phase support with Fertiring® | No luteal phase support | |
| Number | 47 | 53 |
| Age (mean, SD) | 31.5 (3.0) | 32.3 (31) |
| Age partner (mean, SD) | 33.5 (4.1) | 35.0 (4.6) |
| Duration of infertility in months (mean, SD) | 46.1 (37.2) | 57.9 (37.2) |