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| Application Effect of Free Position Delivery Ball Assisted Labor Combined with Non-invasive Labor Analgesia in Natural Delivery of Primiparous Women |
| YU Xiaofang |
| First-author's address: Department of Obstetrics and Gynecology, Jiujiang Maternal and Child Health Hospital, Jiujiang 332000, China |
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Received: 05 December 2025
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