The role of short luteal phases on cycle regularity during the perimenopausal transition

These findings could suggest that it may not be feasible to utilize the occurrence of short luteal phases in the context of expressing the likelihood of cycle irregularity, length, or anovulation. However, because of the small sample size in this study, the null findings could be due to lack of power. Larger studies would be needed to determine how short luteal phases may be correlated to cycle regularity.