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Paracervical block anesthesia might lead to a shorter duration of the first stage of labor and easier cervical dilation, while spinal and epidural anesthesia may prolong the second stage by reducing the urge to bear down or interfering with motor function
Pharmacological substances not approved for human therapeutic use by any governmental regulatory authority are included in this category
10.1089/ars.2016.6866 82 YuF.YuC.LiF.ZuoY.WangY.YaoL.et al (2021)
doi:10.4103/ijem.ijem_45_24
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