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HerdingStarted by a grandfather in 1937, this Florida ranch now covers 50,000 acres, feeds local communities and...BreedsKasaragod Kullan set to be Keralam’s third indigenous cattle variety HistoryAncient cattle love affairs: East Asian cattle genomes reveal Tang-Song dynasty mixing and wild bovine introgression HealthState announces public comment period for proposed bovine tuberculosis testing areas ShowsNortheast 4-H Livestock Show celebrates 91 years of tradition ShowsAnnual Webster Parish 4-H Livestock Show set to begin next week BreedsA Leap Forward in Indigenous Breeding: ICAR–IVRI’s Breakthrough in Producing Sahiwal Calves through Advanced Reproductive Technologies BreedsBoyd Beef Cattle to Donate 2027 Angus Foundation Heifer Package BreedsU.P. State Fair dairy show highlights youth, dairy cattle and community BreedsHereford Cattle Society wins landmark court case over breed status HerdingStarted by a grandfather in 1937, this Florida ranch now covers 50,000 acres, feeds local communities and...BreedsKasaragod Kullan set to be Keralam’s third indigenous cattle variety HistoryAncient cattle love affairs: East Asian cattle genomes reveal Tang-Song dynasty mixing and wild bovine introgression HealthState announces public comment period for proposed bovine tuberculosis testing areas ShowsNortheast 4-H Livestock Show celebrates 91 years of tradition ShowsAnnual Webster Parish 4-H Livestock Show set to begin next week BreedsA Leap Forward in Indigenous Breeding: ICAR–IVRI’s Breakthrough in Producing Sahiwal Calves through Advanced Reproductive Technologies BreedsBoyd Beef Cattle to Donate 2027 Angus Foundation Heifer Package BreedsU.P. State Fair dairy show highlights youth, dairy cattle and community BreedsHereford Cattle Society wins landmark court case over breed status

EveryCow

Artificial insemination

Placing semen from a chosen bull into a cow by hand, without natural mating.

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Also: insemination, frozen semen, sexed semen

In artificial insemination a trained technician places semen from a selected bull into the cow's reproductive tract at the right point in her cycle. It became practical for cattle in the 1930s and 1940s, and after a way of freezing semen was found around 1950, straws of semen could be stored in liquid nitrogen for decades and sent around the world. One bull can now sire calves in many countries, which speeds up breeding progress but narrows the gene pool if few bulls are used. Most dairy cows in Europe and North America are bred this way. In India, state and cooperative technicians reach village herds, and sexed semen is used to favour female calves.

See also

Embryo transfer Progeny testing Genomic selection Bull Heifer

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