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1A. In section 25(1) of the Social Security Act 1975 (widowed mother's allowance), for the words from "or" after paragraph (b) to the end there is substituted "or
(c) if the woman and her late husband were residing together immediately before the time of his death, the woman is pregnant as the result of being artificially inseminated before that time with the semen of some person other than her husband, or as the result of the placing in her before that time of an embryo, of an egg in the process of fertilisation, or of sperm and eggs.