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. 2021 Mar 31;16:2555–2568. doi: 10.2147/IJN.S307189

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© 2021 Shehata et al.

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(A, B) sperms of control rats showing normal morphology; (C) sperms of rats exposed to Zn-NPs showing normal morphology; (D–F) sperms of rats exposed to Ag-NPs and Zn-NPs showing a decreased incidence of head and tail deformities and increased viability compared to Ag-NPs group: live sperm (yellow arrow), dead sperm (red arrow), coiled tail (white arrow), curved tail (black arrow) and detached head (blue arrow).