Research

Transforming our understanding
of embryo implantation

The challenge of embryo implantation

Embryo implantation is a critical yet complex process in human reproduction, with failures contributing to a significant number of early pregnancy losses. Successful implantation requires a precisely coordinated interaction between the embryo and the endometrium, involving intricate molecular dialogues and immune modulation. Understanding these interactions is essential for improving reproductive health outcomes.
Implications for agriculture and sustainability
Beyond human health, implantation challenges also impact livestock industries. Embryonic loss during implantation in animals leads to economic burdens and poses obstacles to sustainable food production. Enhancing implantation success in livestock is crucial for meeting global food demands and reducing the environmental footprint of agriculture.
Research challenges and limitations
Despite its profound impact on both human reproductive health and agricultural sustainability, implantation research faces several significant challenges:
Practical and inherent ethical limitations
of studying implantation in vivo
Inadequate in vitro models that fail to recapitulate
the complex in vivo implantation environment
Lack of integrated understanding of the molecular
dialogue between embryo and endometrium
Species-specific differences in implantation mechanisms
that limit the translational potential of animal studies
The IMPLANTEU project unites a diverse and multidisciplinary network of leading experts from across Europe, creating a collaborative platform for cutting-edge research, and knowledge exchange in implantation science through:
Novel experimental models
State-of-the-art technologies
Cross-sector collaboration
We aim to investigate and characterize the fundamental biology of implantation, driving translational breakthroughs for human fertility and sustainable agriculture. Our research is structured into 13 projects, grouped into three work packages, each focused on key aspects of implantation science and its applications.
A chart that contains 13 boxes with each research project title and an illustration

Research Strategy
and Work Packages

Work Package 1
Embryo-endometrial interactions in human
The impact of chromosomal mosaicism on human peri-implantation development
This research investigates how chromosomal mosaicism affects early human embryo development. Using innovative blastoid models, we explore how embryos with mixed populations of normal and abnormal cells develop. This work aims to understand chromosomal (in)stability during early human development, with direct implications for improving embryo selection in assisted reproduction.
TBD, Eugin Group | Spain
Prof. Mina Popovic, Eugin Group | Spain
Prof. Valery Naranjo, Valencia Polytechnic University | Spain
Institute of Molecular Biotechnology | Austria
KU Leuven | Belgium
Molecular mechanisms of recurrent implantation failure (RIF)
This project investigates the transcriptional and regulatory signatures of human endometrium during implantation. By comparing profiles between fertile women and those experiencing recurrent implantation failure, we aim to identify key molecular pathways and potential therapeutic targets. The research integrates genome-wide genetic variants to build a comprehensive understanding of implantation success and failure.
TBD, Eugin Group | Spain
Dr. Irene Miguel-Escalada, Eugin Group | Spain
Prof. Valery Naranjo, Valencia Polytechnic University | Spain
Leiden University Medical Centre | The Netherlands
Dawn Bio | Austria
Trophoblast invasion during early placentation
This research examines the complex process of trophoblast invasion during early pregnancy. The project focuses on understanding how different trophoblast subtypes interact with maternal tissues, form the syncytium, and establish connections with uterine glands and vessels, crucial steps for successful implantation and placentation.
TBD, Medical University of Graz | Austria
Prof. Berthold Huppertz, Medical University of Graz | Austria
Prof. Susana Chuva de Sousa Lopes, Leiden University Medical Centre | The Netherlands
Eugin Group | Spain
Leiden University Medical Centre | The Netherlands
Anticoagulant proteins at the implantation front
This project maps the intricate anticoagulant machinery active during early human placentation. Understanding how these factors are controlled in space and time is crucial for successful implantation and the maintenance of pregnancy. The research provides insights into the spatial-temporal regulation of coagulation at the maternal-fetal interface.
TBD, Medical University of Graz | Austria
Prof. Martin Gauster, Medical University of Graz | Austria
Professor Petra Arck, University Medical Center Hamburg-Eppendorf | Germany
Eugin Group, Barcelona | Spain
Leiden University Medical Centre | The Netherlands
Progesterone levels in endometrial tissues
This project investigates progesterone concentrations in endometrial tissues during the luteal phase, with a focus on cycle-to-cycle variability and the relationship between tissue and serum levels. The research aims to optimize luteal phase support in assisted reproduction through improved understanding of local progesterone dynamics.
TBD, Ghent University | Belgium
Prof. Dominic Stoop, Ghent University | Belgium
Professor Valery Naranjo, Valencia Polytechnic University | Spain
Valencia Polytechnic University | Spain
Leiden University Medical Centre | The Netherlands
Immune cells in endometrial response
This project examines immune cells of the innate and adaptive endometrial response, investigating their role in implantation and early pregnancy. The research focuses on characterizing different immune cell populations and their contribution to successful implantation or implantation failure.
TBD, University Medical Center Hamburg-Eppendorf | Germany
Prof. Petra Arck, University Medical Center Hamburg-Eppendorf | Germany
Prof. Berthold Huppertz, Medical University of Graz | Austria
Medical University of Graz | Austria
Valencia Polytechnic University | Spain
Work Package 2
Implantation fitness for food production
Role of embryonic toll-like receptor system during preimplantation development
This research investigates the TLR system in bovine embryo development, including bioinformatic analysis of RNA sequencing data from embryos produced through multiple ovulation embryo transfer (MOET), in vitro production (IVP), and various TLR activation protocols. The project examines TLR dynamics between in vivo and in vitro produced embryos and investigates TLR response modulation.
TBD, University of Milan | Italy
Prof. Alberto Luciano, University of Milan | Italy
Prof. Valentina Lodde, University of Milan | Italy
Medical University of Graz, Austria
BiomimX SRL | Italy
Understanding the causes of IVF embryo loss in cattle
This project examines transcriptomic signatures of bovine conceptuses derived from different reproductive techniques. RNA sequencing will be used to characterize conceptuses at Day 16 and evaluate molecular mechanisms of pregnancy establishment and embryo loss.
TBD, University College Dublin | Ireland
Prof. Dr. Pat Lonergan University College Dublin | Ireland
Dr. Paola Occhetta, BiomimX SRL | Italy
BiomimX SRL | Italy
University of Milan | Italy
Work Package 3
An advanced toolkit for implantation research
Ethics of embryo research
This project investigates the ethical implications and policy considerations of using embryo proxies in research. The work aims to develop comprehensive guidelines and recommendations while ensuring responsible advancement of the field.
TBD, KU Leuven | Belgium
Prof. Pascal Borry, KU Leuven | Belgium
Dr. Paola Occhetta, BiomimX SRL | Italy
Ghent University | Belgium
Eugin Group | Spain
Design and development of human endometrium-on-chip
This research focuses on developing an endometrium-on-chip (EoC) device to design and fabricate a microfluidic platform mimicking endometrial cell layers, integrate trophoblast interactions and monitor cellular processes, and validate the system using commercial and primary human cell lines.
TBD, BiomimX SRL | Italy
Dr. Paola Occhetta, BiomimX SRL | Italy
Prof. Marco Rasponi, Polytechnic University of Milan | Italy
University College Dublin | Ireland
University Medical Center Hamburg-Eppendorf | Germany
Development of a 3D human endometrium model
This project aims to develop a comprehensive 3D model of human endometrium using light sheet microscopy to elucidate 3D structure during early pregnancy, hydrogel-scaffold containing primary endometrial stromal and glandular epithelial cells, and an air-liquid interface technique to recreate menstrual cycle phases.
TBD, Leiden University Medical Centre | The Netherlands
Prof. Susana Chuva de Sousa Lopes, Leiden University Medical Centre | The Netherlands
Prof. Dominic Stoop, Ghent University | Belgium
Ghent University | Belgium
BiomimX SRL | Italy
Machine learning algorithm for endometrial receptivity
This project will develop machine learning approaches to predict endometrial receptivity by creating a curated 3D transvaginal ultrasound database, developing machine-learning-based techniques for uterine receptivity characterization, designing algorithms for embryo implantation success estimation, and exploring machine learning techniques for uterine motion analysis.
TBD, Valencia Polytechnic University | Spain
Prof. Valery Naranjo, Valencia Polytechnic University | Spain
Prof. Alberto Luciano, University of Milan | Italy
Eugin Group, | Spain
University of Milan | Italy
Drug screening platform for implantation
This project aims to develop a novel screening platform combining stem-cell based embryos, blastoids with patient-derived endometrial cells to identify potential therapeutic candidates for improving implantation success. The research will establish a high-throughput screening system and validate promising compounds.
TBD, Institute of Molecular Biotechnology | Austria
Dr. Nicolas Rivron, Institute of Molecular Biotechnology | Austria
Dr. Alok Javali, Dawn-Bio GmbH | Austria
Dawn-Bio GmbH | Austria
Eugin Group | Spain
Beneficiaries