For the source text click/tap here: Ketubot 37
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In the Beraisa, Rebbi Yehudah states that a Nochris who converted, a female captive who was redeemed, and a Shifchah (maidservant) who was set free when they were over the age of three years and one day are required to wait three months before they may marry. The Chachamim enacted this period of waiting in order to distinguish between a child conceived from a Nochri and a child conceived from a Jew. If one of these women fails to wait three months, the fatherhood of her baby born soon afterwards is in doubt. Rebbi Yosi disagrees and rules that they may marry immediately and do not have to wait three months.
The Gemara explains that Rebbi Yosi does not share the concern of Rebbi Yehudah because he maintains that a woman who has illicit relations uses a Moch (cloth) to prevent pregnancy, and thus she may marry a Jew immediately after her conversion, redemption, or emancipation.
We explore the use of contraception in antiquity and in Halacha form different denominational perspectives.