A team of scientists from China has successfully created a miniature womb on a chip that mimics the complex environment of the human uterus. The research offers a new way to study the exact moment an embryo attaches to a mother’s body.
Embryo implantation is a critical process that takes place five to seven days after fertilization. However, if an embryo cannot find a place to attach itself and settle in the uterine lining, a successful pregnancy cannot happen.
IVF issues
Many couples undergoing IVF often experience Recurrent Implantation Failure (RIF), where a healthy embryo is unable to implant for reasons that are not always clear. But for a host of ethical and practical reasons, researchers cannot simply look inside a living human uterus to see what is going wrong. And existing lab models do not fully replicate the three-dimensional structure and function of the womb.
So researchers from the Chinese Academy of Sciences developed a 3D in-chip implantation model of the human endometrium, the tissue that lines the uterus.
They describe their work in a paper published in the journal Cell.
To create their womb on a chip, the team embedded human uterine cells into layers of a special gel. They grew into structures that resembled real uterine tissue, which researchers called “endometrioids.” Then they placed the engineered tissue inside a microfluidic chip, which uses narrow channels to circulate nutrients, mimicking the way blood and hormones flow through the womb.
Testing implantation
To see how this environment would handle embryo implantation, the scientists created blastoids, which are derived from stem cells that mimic blastocysts (early-stage embryos that form a few days after fertilization). They also used donated human blastocysts. Inside the chip, both cell types completed all major stages of implantation.
The researchers also built these artificial wombs using cells from women who suffer from RIF. In the models, the blastoids were much less likely to stick and grow, mirroring real-life outcomes. This demonstrated that the model can accurately replicate human infertility.
Another exciting finding was that the team used the chip to screen over 1,000 FDA-approved drugs and identified compounds that improved implantation performance.
“Our 3D implantation model not only recapitulates the key events of human embryo implantation but also provides a powerful tool for personalized drug discovery in patients with recurrent implantation failure,” wrote Leqian Yu, lead author of the study.
This suggests that, one day, the technology could be used to design personalized treatments for women struggling to conceive.
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Publication details
Qian Li et al, A 3D in vitro model for studying human implantation and implantation failure, Cell (2026). DOI: 10.1016/j.cell.2025.10.026
Journal information:
Cell
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