BackgroundIn recent years, there has been growing interest in exploring the potential benefits of dill (Anethum graveolens) seeds in managing labor pain and promoting labor progress. This systematic review and meta-analysis aimed to gather and analyze all available evidence on the efficacy of dill seeds in reducing labor pain and facilitating labor progress. MethodsThe databases of PubMed/MEDLINE, Scopus, Cochrane Central Register of Controlled Trials (CENTRAL), and ScienceDirect have been searched since their inception until June 20, 2023. The risk of bias for clinical trials was evaluated using the Cochrane tool and the National Institutes of Health (NIH) quality assessment tool was used for the evaluation of cohort studies. Meta-analysis was performed on the extracted data. Heterogeneity was assessed using the Chi2 and I2 index. Meta-analyses of all the data were done using RevMan 5.4. ResultsA total of 341 studies were identified through the primary search and after data reduction, finally, five articles remained for assessment. The results showed that the duration of the first stage (MD = −1.71, 95 % CI −2.94--0.48, P = 0.006), second stage (MD = −9.90, 95 % CI −15.51--4.29, p = 0.0005), and third stage (MD = −1.34, 95 % CI −2.14--0.54, p = 0.001) of labor were statistically shorter in the dill seed group, compared with that in the control group. Also, regarding pain intensity during the active stage of labor, the results indicated a favorable outcome for dill seed both overall and in the subgroup analyses of cohort and RCT studies. However, the significant finding was present only in the cohort subgroup (p < 0.00001). ConclusionUsing dill seeds in the active phase of labor in low-risk childbearing women could be an effective and low-cost intervention to reduce labor pain and accelerate labor progress. However, more high-quality clinical trials are needed to provide stronger scientific evidence.
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