A child conceived by a wife during the marriage is presumed to be the child of the husband in that marriage. The same applies to a child conceived by a woman before the marriage and born after the marriage is formed.
妻が婚姻中に懐胎した子は、当該婚姻における夫の子と推定する。女が婚姻前に懐胎した子であって、婚姻が成立した後に生まれたものも、同様とする。
In the case referred to in the preceding paragraph, a child born within 200 days of the formation of a marriage is presumed to have been conceived before the marriage, and a child born more than 200 days after the formation of a marriage or within 300 days of the dissolution or cancellation of a marriage is presumed to have been conceived during the marriage.
前項の場合において、婚姻の成立の日から二百日以内に生まれた子は、婚姻前に懐胎したものと推定し、婚姻の成立の日から二百日を経過した後又は婚姻の解消若しくは取消しの日から三百日以内に生まれた子は、婚姻中に懐胎したものと推定する。
In the case referred to in paragraph (1), if a woman has entered into two or more marriages between the time she conceived the child and the time of the child's birth, the child is presumed to be the child of the husband in the most recent marriage as of the child's birth.
第一項の場合において、女が子を懐胎した時から子の出生の時までの間に二以上の婚姻をしていたときは、その子は、その出生の直近の婚姻における夫の子と推定する。
In the application of the preceding paragraph to a child for whom a father has been determined under the preceding three paragraphs in a case where it has been rebutted under Article 774 that the child is the child in wedlock of that father, the phrase "the most recent marriage" in that paragraph is deemed to be replaced with "the most recent marriage (excluding the marriage with the husband as to whom the presumption that the child is his child in wedlock has been rebutted under Article 774)".