What Is a Long Luteal Phase?
The luteal phase is the second half of a normal menstrual cycle, beginning the day after ovulation and continuing until menstruation begins. Unlike the pre-ovulatory phase, which can vary in length from month to month, a woman typically will have a very set luteal pattern. Most women experience a luteal phase between 10-16 days, with 14 days being very common. A long luteal phase is when the body continues to produce increased levels of progesterone for more than 16 days after ovulation. Long luteal phases are very rare, but can affect fertility and conception planning.
