Ovulation always happens exactly 14 days before the next period.

Many people ovulate between 12–16 days before their next period. The 14‑day rule is only an average.

A perfectly regular cycle means something is wrong if it changes.

It’s normal for cycles to shift slightly due to stress, sleep, travel, or natural hormonal changes.

A longer or shorter cycle is automatically unhealthy.

Cycle length varies from person to person. What matters most is your own consistent pattern, not matching a specific number.

You can only get pregnant on the exact day of ovulation.

Sperm can survive for several days, so the fertile window includes the days before ovulation as well.

Irregular cycles always indicate a medical problem.

Mild irregularity is common and often related to lifestyle factors. Only extreme or persistent changes may need professional attention.