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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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MC cause of abortion in first trimester is, defect in:
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The correct answer is  Ans. is c, i.e. EmbryoRef. Dutta Obs. 7/e, p 159, 160; Williams Gynae 1/e, p 138As explained earlier most common cause of abortion in first trimester are chromosomal abnormalities involving the zygote or embryo.