Uterus Prepares for Implantation

The secretory phase is the part of the menstrual cycle when the uterus prepares for a possible embryo implantation. It usually runs from day 14 to day 28 in a typical 28-day cycle. This phase begins right after ovulation, when an egg has been released.

After ovulation, the corpus luteum forms. Th...

The secretory phase of the menstrual cycle starts after ovulation and spans from day 14 to day 28 in a typical 28-day cycle.

During this period, triggered by progesterone and estrogen produced by the corpus luteum, the endometrium gears up for possible embryo implantation.

As a result, the endometrium thickens to about 12-18 mm.