A muscle with origin from the fifth to twelfth ribs, with insertion into the anterior lateral lip of the iliac crest, the inguinal ligament, and the anterior layer of the sheath of the rectus muscle of the abdomen, with nerve supply from the ventral branches of the lower thoracic nerves, and whose action diminishes the capacity of the abdomen and ...
Ovulation typically occurs about half-way into your menstrual cycle (about 12-14 days before your period on average). Youâll know youâre a few days away from ovulation when you begin to see watery discharge resembling egg whites. 1  When you begin to see this discharge, begin using the OPK.
The time of ovulation within the menstrual cycle is determined by the luteal phase, which is usually 12 to 16 days long in most women. You can calculate the time of ovulation within your cycle by subtracting the length of your luteal phase from the length of your cycle.