METHOD: The design of this study is a Quasi Experiment with pre-test and post-test designs with two groups. The sample of this study was Post Laparatomi in RSU with the technique of Accidental Sampling. The sample of this study consisted of 30 people for lavender and rose aromatherapy. Statistical tests used the Independent Test T-test.

RESULT: Based on the results of the study it was found that lavender and rose aromatherapy can reduce pain scale in postoperative patients. But compared to the two intervention groups, the aroma group of lavender therapy is more effective with mean pain scale before lavender aromatherapy being 5.20 and pre-test is 3.40 with p-value 0.000.

Methods: In this study, to find published articles electronically from 2006 to 2019, the published articles in national and international databases of SID, MagIran, IranMedex, IranDoc, Google Scholar, Cochrane Library, Embase, ScienceDirect, Scopus, PubMed, and Web of Science (ISI) were used. Heterogenic index between studies was determined by Cochrane test (Q)c and I2. Due to heterogeneity, the random effects model was used to estimate standardize difference of the mean score of lavender test in order to assess the labor pain between intervention and control group.

Results: In this meta-analysis and systematic review, finally 13 eligible articles met the inclusion criteria of the study. The sample size from original studies enrolled in the meta-analysis entered in the intervention group was 794 individuals and in the control group was 795 individuals. Mean score for pain in the control group was 7.2 ± 0.42 and in the intervention group was 5.4 ± 0.58 and this difference was statistically significant (p ≤ 0.001).