On the mechanisms of action of short-term levonorgestrel administration in emergency contraception☆
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☆ This study was supported by grants from Family Health International (North Carolina, USA), US Agency for International Development (Washington, DC, USA), the Andrew W. Mellon Foundation (New York, USA), and El Consejo Nacional de Ciencia y Tecnologı́a (Mexico).
PII: S0010-7824(01)00250-5
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