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labour pains; labor pains; birth pains; contractions
陣痛が始まって病院に急いだ。
When labour began, I rushed to the hospital.
陣痛の間隔が十分以内になったら、すぐ知らせてください。
Please let us know right away when contractions are less than ten minutes apart.
陣痛に耐えながら赤ちゃんの誕生を待った。
She endured the contractions and waited for her baby to be born.