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Ovulation Calculator · 2 versions side by side.
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BASELINE
Baseline
Estimated ovulation
June 29, 2026
baseline
First day of last period
2026-06-15
Cycle length
28 days
Fertile window
Jun 24 – Jun 30
Next period
Jul 13
OPTION A
Cycle length: 34 days
Estimated ovulation
July 5, 2026
First day of last period
2026-06-15
Cycle length
34 days
Fertile window
Jun 30 – Jul 6
Next period
Jul 19
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