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Stress can coincide with a later period by affecting cycle timing, but pregnancy, illness, medication, and other factors can also cause delays.
A useful period tracker records flow, pain, mood, symptoms, medication, and cycle variation—not only predicted start dates.
Ovulation is often estimated about 14 days before the next period, but cycle variation matters. Learn how calendar estimates, symptoms, and tracking work together.
Estimate your next period by adding your average cycle length to the first day of your last period. Learn the formula, examples, limits, and what to do with irregular cycles.
Logging mood, flow, and physical symptoms consistently over a few cycles reveals patterns tied to your cycle phases — here's a practical method and what's worth flagging to a doctor.
A late period is usually caused by everyday factors like stress, weight changes, illness, or birth control changes — here are the most common reasons and when to see a doctor.
PMS and PMDD share overlapping symptoms, but PMDD is a distinct condition marked by severe mood symptoms and disrupted daily functioning — here's how to tell them apart.
You can estimate ovulation using basal body temperature, cervical mucus changes, and calendar tracking — no special equipment required, though each method has limits.
A normal menstrual cycle usually falls between 21 and 35 days, but the exact number varies by person — here's what counts as regular, what's irregular, and when to see a doctor.
Period tracking apps predict cycles using your own logged history, so accuracy depends on consistent tracking — here's what they can and can't reliably predict.
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