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Twenty micrograms vs. >20 microg estrogen oral contraceptives for contraception: systematic review of randomized
Maria F Gallo1, Kavita Nanda, David A Grimes
1Family Health International, Research Triangle Park, NC 27709, USA.
Abstract:
Concern about estrogen-related adverse effects has led to progressive reductions in the estrogen dose in combination oral contraceptives (COCs). This review of randomized controlled trials tested the hypothesis that COCs containing
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