A normal luteal phase is about 11 to 17 days. This can vary cycle to cycle, but most women only notice if they're charting their cycle. The exact length of your luteal phase isn't typically concerning. As long as it falls within the normal range, variation cycle to cycle is fine.
Does luteal phase change every month?
On average, the luteal phase is between 12 and 14 days. However, it can be as short as 8 days and as long as 16 days. Whatever your regular luteal phase length is, it tends to be a consistent length every cycle.
Can you have an irregular luteal phase?
A luteal phase defect can happen to you if your ovaries don't release enough progesterone, or if the lining of your uterus doesn't respond to the hormone. The condition has been linked to many health problems, including things like: Anorexia.