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Menstruationszyklus-Rechner – Perioden- und Eisprung-Tracker

Calculate menstrual cycle phases and predict next period

This calculator provides estimates based on average cycles. Consult a healthcare provider for personalized medical advice.
Calculate Cycle

Wie zu Verwenden

  1. Enter the first day of your last period
  2. Enter your average cycle length (default: 28 days)
  3. Enter your average period duration (default: 5 days)
  4. Click calculate to see predictions

Menstrual Cycle Phases

The menstrual cycle has four phases: menstrual, follicular, ovulation, and luteal.

PhaseDaysDescription
Menstrual1-5Period bleeding occurs
Follicular6-13Uterine lining rebuilds
Ovulation14Egg is released
Luteal15-28Body prepares for possible pregnancy

Why Track Your Cycle

  • Predict periods for planning
  • Identify fertile days for conception or contraception
  • Monitor cycle irregularities
  • Understand your body's patterns

Häufig gestellte Fragen

How accurate is this calculator?
The calculator provides estimates based on average cycle patterns. Actual dates may vary based on individual factors.
What is a normal cycle length?
Normal cycles range from 21-35 days, with 28 days being average. Cycle length can vary from month to month.
When is the fertile window?
The fertile window is typically 5 days before ovulation through 1 day after, when pregnancy is most likely.

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