Additional file 8 of The effectiveness of different down-regulating protocols on in vitro fertilization-embryo transfer in endometriosis: a meta-analysis
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Additional file 8: Figure S4. Meta-analysis on basal E2 levels: the ultra-long protocol versus long protocol in RCTs (A) and in non-RCTs (B), and the ultra-long protocol versus short protocol in non-RCTs (C).
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