Sexed semen technology is now commercially available in many countries around the
world, and is primarily used in dairy cattle breeding. Sperm are sorted by flow cytometry on …

Use of sexed semen for artificial insemination of US Holstein heifers (1.3 million breedings)
and cows (10.8 million breedings) in Dairy Herd Improvement herds was characterized by …

These data summarize on-farm records of dairy herds (n= 211) using sexed semen. Sexed
semen was predominantly used at first and second service in virgin heifers, which is …

Mammalian females pay high energetic costs for reproduction, the greatest of which is
imposed by lactation. The synthesis of milk requires, in part, the mobilization of bodily …

The sex of the animals is of paramount importance in many animal production systems. This
is particularly evident in the production of milk or in breeding programs focused on the …

Ejaculates were collected by artificial vagina from 3 Holstein sires and sorted to 90% purity
for X-chromosome-bearing spermatozoa (range 88 to 93%) using flow cytometry. Sorted …

Dairy farmers can increase the number of dairy heifer calves born in their herd by using
sexed semen. They can reduce the number of both dairy bull and heifer calves by using beef …

Background The use of sex-sorted sperm in cattle assisted reproduction is constantly
increasing. However, sperm fertility can substantially differ between unsorted (conventional) …

The objective was to compare conceptions rates of Holstein cows and heifers after artificial
insemination (AI) with 2.1 or 3.5× 106 sex-sorted sperm or 15× 106 conventional sperm …

In Masterminding Nature, Margaret Derry examines the evolution of modern animal
breeding from the invention of improved breeding methodologies in eighteenth-century …