排卵推定器 — 妊娠可能期間計算機
最後の生理開始日と平均周期の長さを入力して、排卵日と最も妊娠しやすい日を推定します。
Estimated ovulation date
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Fertile window
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Next period
これは平均に基づいた推定です。周期の長さは月ごとに異なります。避妊には信頼できません。家族計画については医師に相談してください。
よくある質問
How accurate is this ovulation estimator?
Ovulation estimators based on cycle length provide a reasonable estimate for women with regular cycles. However, ovulation can vary by several days each month due to stress, illness, travel, or hormonal fluctuations. For greater accuracy, combine this with ovulation predictor kits (OPKs) or basal body temperature tracking.
What are the signs of ovulation?
Common signs include a slight rise in basal body temperature, changes in cervical mucus (becomes clear, stretchy, and egg-white-like), mild pelvic pain or cramping on one side (mittelschmerz), increased libido, and breast tenderness. Some women also notice light spotting.
Can stress delay ovulation?
Yes. Physical or emotional stress can delay or even suppress ovulation by disrupting the hormonal signals from the hypothalamus and pituitary gland. This is why cycles may become irregular during stressful periods, illness, or major life changes.
What if my cycles are irregular?
If your cycle length varies significantly (more than 7 days between shortest and longest cycles), a calendar-based estimator will be less reliable. Consider tracking ovulation with OPKs, basal body temperature, or cervical mucus monitoring. Persistent irregularity warrants a conversation with your healthcare provider.