Table 4.
Observed vs Expected Pregnancies
| Age | Transfers | Pregnancies | ||
| Observed | CDC 2001 Rate | Expected | ||
| < 35 | 15 | 11 (73%) | 47.7% | 7.15 |
| 35–37 | 6 | 4 (67%) | 42.0% | 2.52 |
| 38–40 | 5 | 3 (60%) | 33.8% | 1.69 |
| 41–42 | 4 | 3 (75%) | 23.6% | 0.94 |
| <42 | 3 | 1 (33%) | 12.1% | 0.36 |
| Total | 33 | 22 | 12.7 | |
Observed = rate for Manual pre-IVF treatment (study)
Expected = projected from CDC Figure 13[32]
(Expected = Transfers times published CDC 2001 probability. For example, the published CDC 2001 pregnancy rate for a <35 year old woman is 47.7%, hence with 15 transfers, one expects 15 x 0.477 = 7.15 pregnancies; the observed number was 11.)