Ovulation

Ovulation is part of the menstrual cycle and refers to the release of an egg from an ovary. The timing is not identical in every cycle, which is why a calendar or app can estimate an ovulation date but cannot confirm that ovulation happened on a particular day.

Guides in this collection explore ovulation timing, physical signs, fertile-window concepts, ovulation tests, basal body temperature, cervical mucus and the limitations of calendar predictions. Different tracking methods provide different kinds of information and should not be treated as interchangeable.

If periods are repeatedly absent or very unpredictable, or if you have concerns about ovulation or fertility, a healthcare professional can evaluate factors that an app cannot measure.