The luteal phase of the menstrual cycle typically lasts about 12 to 14 days, starting right after ovulation and ending when your menstrual period begins
. However, it can vary somewhat, with a normal range considered to be between 10 and 17 days
. If the luteal phase is shorter than 10 days, it is considered a short luteal phase, which may affect the uterine lining's ability to support embryo implantation and can make conception more difficult
. Conversely, a luteal phase longer than about 16 days is considered long and may indicate hormonal imbalances or pregnancy
. Despite variations in overall menstrual cycle length, the luteal phase length tends to remain relatively consistent, averaging around 14 days for most people
. In summary:
- Average luteal phase length: 12–14 days
- Normal range: 10–17 days
- Short luteal phase: less than 10 days
- Long luteal phase: 16 days or more
This phase is crucial for preparing the uterus for pregnancy by thickening the uterine lining through progesterone production from the corpus luteum
. If pregnancy does not occur, hormone levels drop, leading to menstruation and the start of a new cycle
