Ovulation 计算器
估算您的下一个 ovulation 日期和 fertile window 从您的周期.
最后更新：
Dates are calendar estimates, not proof of ovulation. A variable cycle can make predictions less dependable.
Enter your last period date and cycle length to see your estimate.
Cycle Calendar
Explore More Features
Select a feature to open it. The others stay neatly tucked away.
Upcoming Predicted Cycles
These future dates assume the same cycle length continues. They are not confirmed ovulation dates.
Compare Cycle Lengths
Explore how changing the assumed cycle length shifts the next predicted ovulation date.
Ovulation Tests and Signs
An LH urine test may indicate a hormonal surge before ovulation. A positive result often precedes ovulation by roughly one to two days, but does not confirm it. Cervical mucus changes can also offer clues.
Hormonal conditions, medications and test timing can affect LH results. Seek professional advice for interpreting uncertain results.
Calculation Method
Actual ovulation and luteal-phase length vary, even with regular cycles. This calculator cannot confirm ovulation, diagnose a condition or provide reliable contraception. Calculations happen within this widget in your browser; dates are not saved or sent by this code. The calendar download contains the dates you choose to export.
Important: For education and pregnancy planning only. Estimated non-fertile days are not safe days for avoiding pregnancy. If cycles are irregular or ovulation timing matters medically, consult a qualified healthcare professional.
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Ovulation typically occurs 关于 14 天之前您的下一个期间开始, regardless 的您的总计周期长度 — 哪个是为什么周期长度, 不一固定日历日期, 确定您的估计 fertile window.
为什么周期长度很重要更多比一固定天
一常见 misconception 是那 ovulation 始终发生在 "天 14" — 那仅 true 用于一精确 28-天周期. 用于一 32-天周期, ovulation 是估计大约天 18. 这计算器调整自动基于在您的实际平均周期长度.
常见问题
如何准确是这估算?
这是一有用起始估算, 但 ovulation predictor kits 或 tracking basal 正文 temperature 给出更多精确, personalized 数据.
什么如果我的周期长度有所不同月到月?
使用您的平均周期长度超过过去多个个月用于大多数 reasonable 估算.