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排卵日前4天同房有一定怀孕概率。通常对于月经周期规律的女性，会把排卵日界定为下次月经来潮前的第14天。在排卵日的前5天和排卵日的后4天，加上排卵日当天这10天的时间界定为排卵期，在排卵期同房自然怀孕的概率，也就是在排卵期一次性同房受孕的概率

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排卵日前四天同房会不会怀孕

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排卵日前四天同房会不会怀孕-有来医生

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