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Benefits of the Eeva Test for Embryo Selection

Eeva stands for “Early Embryo Viability Assessment” – and that’s exactly what the EevaTM Test does. It assesses an embryo’s potential for further development and provides embryologists with insights to help them select the best embryo for transfer in an IVF cycle.

“What we as embryologists have been doing for more than 30 years was to rely on traditional morphology,” says Shehua Shen, Vice President of Medical and Scientific Affairs at Progyny. Morphology is an evaluation of what an embryo looks like under a microscope: the number of cells, degree of fragmentation and symmetry. Because morphology requires taking embryos out of an incubator, it is normally done only once a day. Based on several morphology criteria, clinicians have historically decided which embryos to transfer.

“As a field, we’ve mastered how to use morphology to assess embryos,” Shen says. “However, the Eeva Test can supply us unique information that we did not have before to help us select the best embryo or embryos. The Eeva Test can give us insight into the dynamic pathway that embryos followed in their early development by calculating timing intervals between different cell stages. Based on these cell division timings, the Eeva Test can identify which embryos have higher or lower potential.”


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