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Reference:
1.Woutersz TB, Korba VD. Five-year, multicenter study of a triphasic, low-dose, combination oral contraceptive. Int J Fertil. 1988;33(6):406-10.
2.Cooper DB, Patel P. Oral contraceptive pills. StatPearls [Internet]. Update 2024 [cited 13 May 2025]. Available from: https://www.ncbi.nlm.nih.gov/books/NBK430882/.
3.Yuksel N, Whelan AM. A practice tool for initiating and managing combined hormonal contraceptives for contraception: Assessment, decision-making and monitoring. Can Pharm J (Ott). 2024;157(1):30-8.
Keywords:
combined oral contraceptive, efficacy
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