妊娠危険日計算|安全日・危険日・生理日自動計算ツール～安全日危険日とは？,lesbian porn videos

危険日の範囲 = 妊娠危険日計算排卵日 – 5日 から 排卵日 + 1日; 安全日の範囲 = 最後の月経開。

排卵日 = 最後の月経開始日 + 周期の半分. 例えば、最後の月経開始日が4月1日で、周期が30日。

危険日：生理開始日から14日目前後（排卵日）の前後5日間が最も妊娠しやすい期間です。 オ。

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