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• The found gene module associates with the ubiquitin-mediated proteolysis pathway. • This gene module drives the proliferation of endometriosis endometrial cells. • GWES of 142 patients and 71 control subjects were analysed in this study. • WGCNA enabled the analysis of co-expression gene clusters rather than single-gene. • The NNET model discovered the clinical value of hub genes for endometriosis. Is abnormal gene module expression in the eutopic endometrium related to the occurrence of endometriosis? Nine datasets of normal and eutopic endometrium were searched and collected through the National Center for Biotechnology Information Gene Expression Omnibus, which included genome-wide expression studies of 71 normal cases and 142 endometriosis cases. Surrogate variable analysis was used for dataset integration. The network module and hub genes were selected by weighted gene co-expression network analysis. Machine learning was used to establish a diagnostic model of endometriosis. A gene module that was most relevant to endometriosis was selected through weighted gene co-expression network analysis. After further analysis of this module, four hub genes that represent the function of this module were selected: SCAF11, KRAS, MDM2 and KIF3A. Kyoto Encyclopedia of Genes and Genomes enrichment analysis of the four hub genes revealed that all of them were most highly correlated with genes enriched in the ubiquitin-mediated proteolysis pathway. Moreover, in the correlation analysis between hub genes and Jab1, SCAF11 was found to be closely related to Jab1. Furthermore, hub genes were effective indicators for clinical diagnosis. The deep machine learning diagnostic model based on hub genes was highly sensitive. The gene module identified is highly correlated with endometriosis. The four hub genes in this module degrade p27kip1 through the ubiquitin-mediated proteolysis pathway to regulate the endometrium cell cycle and affect the development of endometriosis. The hub genes and the deep learning model based on them are valuable for clinical diagnosis. [ABSTRACT FROM AUTHOR]

• Preoperative estrogen therapy may improve the short-term prognosis of IUAs. • There was no sufficient evidence of the effect on reproductive outcomes. • More well-designed, randomized controlled trials are needed. The aim of this systematic review and meta-analysis was to assess the effect of oestrogen therapy as a preoperative intervention for improving clinical outcomes and fertility outcomes in women with intrauterine adhesions (IUA). A systematic search of PubMed, Embase, The Cochrane Library, clinicaltrials.gov, OVID and Chinese databases was carried out to identify relevant studies published before December 2019. Outcomes were expressed as odds ratios and 95% confidence intervals. Five cohort studies with moderate to high methodological quality were included in the meta-analysis. Preoperative oestrogen therapy was strongly associated with better clinical outcome at second-look hysteroscopy (OR 2.72; 95% CI 1.49 to 4.96; P = 0.001); whereas no significant difference was found in menstruation improvement and conception rate (OR 1.45; 95% CI, 0.95 to 2.23; P = 0.09; and OR 0.96; 95% CI 0.60 to 1.54; P = 0.87, respectively). The overall quality of the evidence ranged from moderate to very low. Preoperative oestrogen therapy may improve the short-term prognosis of IUA at second-look hysteroscopy, whereas the long-term prognosis-fertility outcome was similar to the control group. More strictly designed research studies are needed to assess the effectiveness of oestrogen administration before hysteroscopic adhesiolysis. [ABSTRACT FROM AUTHOR]