EN
Between 1967 and 1991, otters Latra lutra (Linnaeus, 1758) were collected from Belarus and NW Russia (St. Petersburg, Pskov, and Novgorod regions). Reproductive status was assessed by histological study of the reproductive organs of 99 otters. Reproductive maturity was recorded in otters > 2 years old. No definite breeding period could be determined. The uteri of 10 females contained from 2 to 4 non-resorbing embryos, 2.6 on average. The sizes of 81 litters of blind cubs were counted; an average of 2.6 cubs per litter was recorded.