Endometriosis is a chronic condition where tissue similar to the endometrium (the inner lining of the uterus) grows outside the uterus. The condition can cause many symptoms, including painful and heavy periods and bowel problems. It may also interfere with fertility. Treatments usually include pain medication, hormone therapy, and surgery.

The first half of the proliferative phase starts around day 6 to 14 of a person’s cycle, or the time between the end of one menstrual cycle, when bleeding stops, and before ovulation. At this.