Ovulation and menstruation start near the end of puberty, generally when a girl is about twelve-and-a-half, though any age from nine to 18 is normal. Each month during a woman's reproductive years ...

Many ovulation tests will give you accurate results at any time of the day, but some ovulation tests are the most accurate when you take them in the afternoon. If taking an ovulation test in the ...

and predicted ovulation day – as well as detect ovulation. This was tested against the traditional calendar method, which relies on estimations based on menstrual cycle history. The study ...