PRELI® test. See the endometrium clearly. Treat with confidence.

Despite major advances in embryo assessment, a significant proportion of implantation failures and miscarriages remain unexplained. For many fertility specialists, the endometrium has long been a black box — biologically active, clinically decisive, but difficult to measure.

The PRELI test changes that. Built on decades of research led by Professor Jan Brosens, the test is designed to assess the decidual reaction: the tightly regulated inflammatory process that progesterone triggers each cycle to prepare the womb lining for implantation. When this process is dysregulated, pregnancy can fail.  Even with a healthy embryo.

Download the brochure for healthcare professionals below to learn what PRELI measures, what it reveals, and why it matters to your practice.

When the endometrium is understood, fertility care becomes more precise.