Contraceptives, Oral, Hormonal |
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| Contraceptive Agents, Estrogen; Contraceptive Agents, Oral, Hormonal; Hormonal Oral Contraceptive Agents; Oral Contraceptive Agents, Hormonal; Oral Contraceptives, Hormonal; Agents, Estrogen Contraceptive; Contraceptives, Hormonal Oral | |
| Oral contraceptives which owe their effectiveness to hormonal preparations. | |