There are two previous randomized controlled studies on TE; both showed a trend towards better pregnancy rates but did not reach statistical significance [ 34 , 35 ].
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Endometrial Infusion with Plasma Rich in Growth Factors (PRGF) in IVF Cycles: Randomized Clinical Trial in Very Thin Endometrium and Observational Uncontrolled Follow-Up After the Randomized Clinical Trial.
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When the subanalysis was restricted to women with or without previous curettages, a similar trend was observed although it did not reach statistical significance.