Reference:
1. Centers for Disease Control and Prevention (CDC). U.S. Selected practice recommendations for contraceptive use, 2016. MMWR Recomm Rep 2016;65:34-6.
2. Postinor®-1 product information: Bayer; 2014.
3. Lacy CF, Armstrong LL, Goldman MP, Lance LL. Drug Information Handbook with International Trade Names Index, 24th ed. Ohio: Lexi-Comp Inc; 2015-16:1201-4.
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