When did artificial insemination become widely used for cattle and sheep in the Soviet Union?

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The Soviet biologist Ilya Ivanov pioneered the development of artificial insemination techniques for livestock in the early 20th century, establishing the Central Experimental Breeding Station in Moscow in 1919.12

While these methods were further refined in Russia during the 1930s, the practice had already achieved significant scale by that time. Records indicate that by 1936, more than 6,000,000 cattle and sheep had been artificially inseminated in the Soviet Union.32