Table 3.
The “regression to the mean” effect
| Group A (n = 135) | Group B (n = 37) | Group C (n = 42) | |
|---|---|---|---|
| 1st cycle | 7.3 ± 3.6 | 4.5 ± 3.7 | 20.2 ± 4.6 |
| 2nd cycle | 9.2 ± 4.9 | 8.7 ± 5.8 | 15.6 ± 6.2 |
| P = 0.00003 | P = 0.0005 | P = 0.0002 |
Numbers represent mean of oocytes collected ±SD.
Group A: women who had received 225 IU of recFSH in the first cycle and 300 IU in the second cycle.
Group B: women who had <10 oocytes collected when receiving 225 IU of recFSH in the first cycle and remained on 225 IU in the second cycle.
Group C: women who had >15 oocytes collected when receiving 225 IU of recFSH in the first cycle and remained on 225 IU in the second cycle.
Pairwise comparison between 1st and 2nd cycle using Paired Student’s t Test.