Cycle Details
21
28 days
45
Tip
For best accuracy, track your cycle for at least 3 months. The average cycle is 28 days, but normal ranges are 21-35 days.
Next Period
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Ovulation
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Fertile Window
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Best Days
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Fertility Calendar
Ovulation
Fertile
SUN
MON
TUE
WED
THU
FRI
SAT
Cycle Timeline
Hormone & Fertility Probability
Understanding Your Fertility
Ovulation
Ovulation typically occurs 14 days before your next period. The egg lives for 12-24 hours after release.
Fertile Window
Your fertile window includes 5 days before ovulation plus the ovulation day. Sperm can survive up to 5 days.
Signs to Watch
Basal body temperature rise, egg-white cervical mucus, mild cramping (mittelschmerz), and increased libido.