===Withdrawal===
Besides being ineffectiveWhen opponents of contraception look for biblical support for their position, methods they inevitably point to the story of withdrawal have traditionally been opposed Onan in Genesis 38, claiming that the sin committed by Onan was his commission of ''coitus interruptus''. However, this is an almost exclusively Western reading of the Church text. The only Eastern Father to read the Onan account as overa condemnation of contraception was St Epiphanius. Origen had not done so in his commentary on the passage, <ref>Selections on Genesis, PG 12.129</ref>, nor had St John Chrysostom <ref>''Homilies on Genesis'' 62.1, PG 54.533)</ref>, nor St Ephrem the Syrian<ref>''In Genesim et in Exodum commentarii'', 34.1</ref>. Moreover, according to Noonan, Epiphanius had taken this position “only in the context of his anti-indulgence Gnostic polemic.”<ref> Noonan, p. 101.</ref> It was his friend St Jerome who was to shape the Western (mis)reading of Onan through his Vulgate, which departed significantly from both the Hebrew and Old Latin he used as the basis of his translation. In addition to adding the fleshword for semen which is not in the original, he slants the text to make it appear that ''coitus interruptus'' was the reason he was punished by God, saying “God slew him because he did a detestable thing". But the Hebrew has only “he did not please God,” and the Old Latin that “he appeared evil before the Lord,” neither of which focuses on the act.<ref>See Noonan, pp. 101-102.</ref>.
===Barrier Contraceptives===
