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| Changes in the Use of Long-acting Contraceptive Methods and the Influence before and after the Implementation of the Two-child Policy |
| WANG Min, LIU Jinping |
| First-author's address: Department of Women's Health, Lixia Maternal and Child Health and Family Planning Service Center of Jinan, Jinan 250012, China |
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Received: 06 February 2025
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