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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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For prevention of pre term labour in a patient with a history of a preterm delivery the following is used :
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The correct answer is  Progesterone can be used for prevention of preterm bih in patients with past history of preterm delivery. It can be given from 16 weeks till 36 weeks to prevent preterm labour. However it is not effective once the contractions have staed.