I thought that the luteal phase was supposed to be the same length each cycle. Mine keeps changing. Is that a problem?
Within an individual woman, the luteal phase is normally very consistent from cycle to cycle, usually varying by only 1 or 2 days at the most. However, if your luteal phase varies significantly from cycle to cycle (and you are able to clearly identify your ovulation day), this may be a sign of hormone imbalance.
Highly variable luteal phase lengths are thought to be associated with low estrogen and progesterone levels, which can result in an increased risk of miscarriage. If you are having difficulty getting (or staying) pregnant, talk to your doctor about getting assessed and treated for a possible hormone imbalance.
For further information on hormonal imbalance and what you can do about it, check out the Step 3 resource ‘Your guide to – Hormonal Imbalance’