Table 2 Incident risk ratio of miscarriage in the presence or absence of short luteal phases or anovulatory cycles in any of the prior 3 cycles, adjusted for age
From: Does a short luteal phase correlate with an increased risk of miscarriage? A cohort study
Luteal phase | Women | Miscarriages | Percent | IRR | 95% CI | |
|---|---|---|---|---|---|---|
>  = 11 days (referent) | 138 | 28 | 20.3% |  |  |  |
< 11 days | 113 | 20 | 17.7% | 0.87 | 0.52 | 1.46 |
< 10 days | 111 | 20 | 18.0% | 1.01 | 0.57 | 1.8 |
< 9 days | 56 | 11 | 19.6% | 1.03 | 0.57 | 1.9 |
< 8 days | 32 | 7 | 21.9% | 1.17 | 0.57 | 2.38 |
Anovulatory | 69 | 14 | 20.3% | 1.01 | 0.57 | 1.8 |