Human Zygote Ploidy Normalization Using a 1033 nm Femtosecond Laser

Near-infrared femtosecond laser is a promising tool for oocyte and embryo manipulation. In nuclear transfer and mitochondrial replacement therapy, this laser can be successfully applied for the enucleation. In addition, it can be used for zygote ploidy normalization by pronuclear destruction. The aim of this work was to develop a new technique for normalizing zygote ploidy. We applied 1033 nm femtosecond laser radiation to eliminate a pronucleus in three-pronuclear human zygotes. The study showed that destruction of pronuclear DNA occurred under the action of the femtosecond laser. At the same time, the zygotes retained their structure and even their ability to cleave. Thus, we suppose that femtosecond laser can be useful for pronuclear destruction and zygote ploidy normalization.