If it is believed that the rules are 11 to 16 days after ovulation, this does not work. How can this be explained?

Ovulation typically occurs between 10 to 14 days before the next menstruation cycle, which is usually around days 14 to 18 of a 28-day cycle. It is important to follow the manufacturer's instructions when using ovulation tests, as variations can occur even in healthy individuals. Conceiving can be challenging due to the inherent variations in the menstrual cycle.