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Mate KE et al. Timetable of in vivo embryonic development in the grey short-tailed opossum (Monodelphis domestica). doi: 10.1002/mrd.1080390404. Moore HD, Taggart DA. Sperm pairing in the opossum increases the efficiency of sperm movement in a viscous environment. doi: 10.1095/biolreprod52.4.947. Morcillo I Soler P, et al. Bundle formation of sperm: Influence of environmental factors. doi: 10.3389/fendo.2022.957684. New DA…