Archives of Gynecology and Obstetrics

, Volume 297, Issue 6, pp 1577–1586 | Cite as

Proteomic pattern of implantative human endometrial fluid in in vitro fertilization cycles

  • Roberto Matorras
  • Sara Quevedo
  • Blanca Corral
  • Begoña Prieto
  • Antonia Exposito
  • Rosario Mendoza
  • Aintzane Rabanal
  • María Diaz-Nuñez
  • Marcos Ferrando
  • Felix Elortza
  • Amagoia Ametzazurra
  • Daniel Nagore
Gynecologic Endocrinology and Reproductive Medicine



To assess whether there are proteins in endometrial fluid aspirate (EFA) that predict implantation.


The population under study consisted of 285 women undergoing embryo transfer (ET). Endometrial fluid aspiration was performed immediately before ET. Results of proteomic analysis of EFA were compared between 33 cases who achieved pregnancy and 33 who did not. Samples were analysed by 2D electrophoresis and mass spectrometry. Blood samples were studied by ELISA Pregnancy rates and maternal complications were compared to those in women refusing aspiration.


We found 23 proteins differentially expressed in the EFA in conception cycles: 4 up-regulated proteins and 19 down-regulated (FC = 0.31 0.78) (among others, arginase-1, actin B, PARK-7, cofilin-1, stathmin, annexin-2 and CAPZB). Among the five studied proteins that were differentially expressed in EFA, none was differentially expressed in serum. The aspiration procedure had no impact on pregnancy rate. No maternal complications were reported.


We found a very different protein profile in implantative cycles, the majority of proteins being down-regulated. This probably reflects a different endometrial functional status, more favourable to implantation. EFA proteomic analysis could be a useful tool in the planning ET strategies.


Endometrium Implantation IVF Endometrial fluid Proteomics 


Author contributions

RM: manuscript writing, supervision. SQ: data collection. BC: data collection. BP: supervision. AE: investigation, manuscript writing. RM: protocol. AR: supervision. DM: data collection. MF: protocol. FE: methodology. AA: methodology, validation, software. DN: methodology, validation, software


This study was partially funded by a Grant for Fertility Innovation (GFI, 2011) from Merck, Darmstadt, Germany.

Compliance with ethical standards

Conflict of interest

Authors declare that they have not conflict of interest.

Informed consent

We obtained approval from the Institutional Review Board (CEIC 09/54 and CEIC 11/45) and informed consent from participants.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Roberto Matorras
    • 1
    • 2
  • Sara Quevedo
    • 1
  • Blanca Corral
    • 1
  • Begoña Prieto
    • 1
    • 2
  • Antonia Exposito
    • 1
  • Rosario Mendoza
    • 1
  • Aintzane Rabanal
    • 1
  • María Diaz-Nuñez
    • 1
  • Marcos Ferrando
    • 2
  • Felix Elortza
    • 3
  • Amagoia Ametzazurra
    • 4
  • Daniel Nagore
    • 4
  1. 1.Human Reproduction Unit, Cruces University Hospital. BiocrucesBasque Country UniversityBilbaoSpain
  2. 2.Instituto Valenciano de Infertilidad, IVI BilbaoBilbaoSpain
  3. 3.CIC- Biogune, Science and Technology Park of BizkaiaDerioSpain
  4. 4.Progenika- Biopharma SA. Grifols. Science and Technology Park of BizkaiaDerioSpain

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