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  • Title: A visual aid to the classification of oral contraceptives.
    Author: Law B, Mumford JP, Hoonakker EW.
    Journal: Curr Med Res Opin; 1974; 2(1):7-12. PubMed ID: 4135338.
    Abstract:
    A method for classifying oral contraceptive preparations is presented. The comparative potency of estrogen and progestogen in any formulation is plotted on coordinate axes. The point representation for the formulation in question will thus reflect the overall potency, character, and types of possible side effects for a particular oral contraceptive. Illustrations show how to use this system for both contraceptive and infertility therapy.
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