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| Application of Controlling Fetal Head Delivery Speed Based on Perineal Central Tendon Tension as a Standard in Primiparous Women Undergoing Natural Delivery |
| QIU Tianshuang, XIAO Dan, LYU Chunxiu, LI Muzi, XIAO Yiran |
| First-author's address: Department of Gynaecology and Obstetrics, Beijing Huairou Hospital, Beijing 101400, China |
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Received: 02 February 2024
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