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. 2022 Jun 26;9(7):321. doi: 10.3390/vetsci9070321

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Representative images of testicular histology. (A): Control group. HE: 200×. (B): E1 group. HE: 200×. (C): E2 group. HE: 200×. (D): Control group. Toluidine Blue Polychromatic: 200×. (E): E1 group. Toluidine Blue Polychromatic: 200×. (F): E2 group. Toluidine Blue Polychromatic: 200×. (G): Control group. Sirius red: 200×. (H): E1 group. Sirius red: 200×. (I): E2 group. Sirius red: 200×. Black arrows show seminiferous tubules and germ cells in various stages of development. Red arrows show mature sperm in seminiferous tubules. Green arrows show septa between seminiferous tubules.