Luteal phase changing?

McKenna

Is it normal for the luteal phase to change after a loss? Back in November I had an early loss, a chemical. I've had two cycles since and my luteal phase is almost always 13 days. It's been that length for as long as I can remember. After my loss, first cycle luteal phase was 14 days, and second cycles was 12 days. Is this normal? No mid cycle spotting tho, nothing else has changed since.