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Biodynamic digital holographic speckle microscopy for oocyte and embryo metabolic evaluation

Zhe Li, Ilka M. Lorenzo-Lorenzo, Ran An, John Turek, David D. Nolte, and Zoltan Machaty

Abstract

Assisted reproductive technologies seek to improve the success rate of pregnancies. Morphology scoring is a common approach to evaluate oocyte and embryo viability prior to embryo transfer in utero, but the efficacy of the method is low. We apply biodynamic imaging, based on dynamic light scattering and low-coherence digital holography, to assess the metabolic activity of oocytes and embryos. A biodynamic microscope, developed to image small and translucent biological specimens, is inserted into the bay of a commercial inverted microscope that can switch between conventional microscopy channels and biodynamic microscopy. We find intracellular Doppler spectral features that act as noninvasive proxies for embryo metabolic activity that may relate to embryo viability.

© 2020 Optical Society of America

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