The Secretory Phase is Always Longer Than the Proliferative Phase

Question

The secretory phase is always longer than the proliferative phase.

Accepted Answer

The proliferative phase and the secretory phase of the menstrual cycle are not fixed in length, and the secretory phase is not always longer than the proliferative phase. The length of each phase can vary among individuals and even from cycle to cycle for the same individual. Typically, the proliferative phase lasts from the end of menstruation until ovulation (approximately day 5 to day 14 of a 28-day cycle), while the secretory phase lasts from ovulation until menstruation begins (approximately day 14 to day 28 of a 28-day cycle), making them roughly equal in length but variable.