Menstruationszyklus-Rechner
Zyklusdaten eingeben
d
d
Nächste Periode
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Periode
Fruchtbares Fenster
Eisprung
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Tage bis zur Periode
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Eisprung-Tag
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fruchtbare Tage
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Zyklustag
Nächste 6 Zyklen
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Über das Tool
How does the menstrual cycle calculator work?
The tool predicts future periods based on the first day of your last period and your average cycle length.
Cycle Phases
- Menstruation (days 1–5): Shedding of the uterine lining.
- Follicular phase: Egg maturation.
- Ovulation (day ~14 of 28-day cycle): Egg release — peak fertility.
- Luteal phase: Uterus prepares for possible fertilization.
Fertile Window
Highest chance of conception is in the 5 days before ovulation and on ovulation day itself.
⚠️ This tool provides estimates only. Cycles vary month to month. Consult your doctor for medical advice.
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