The World's source for Bovine Genetics

gender SELECTed Sires

Most of us have heard the rumor that sexed semen is “just around the corner” for as long as we have been aware of A.I. Through the years, countless numbers of techniques have been investigated with little to no indication of repeatable success.

However, in the 1980s a breakthrough in semen sexing technology was made by USDA researchers in the Lawerence Livermore Laboratory in California. The patents for this technology were licensed to a company named XY Inc. of Fort Collins, Col., which has performed a considerable amount of research during the 1990s to optimize efficiency of these sorting procedures.

Commercialization of sexed semen in the United States has been initiated with a 2003 license granted to Sexing Technologies (ST) in Navasota, Texas. Select Sires and ST are partnering to bring highly proven, gender SELECTed™ Sires to U.S. dairy producers.
Sexed-Semen Lab Now in Operation at Select Sires
gender SELECTed Sires - May 2008 (PDF)
Select Sires, The Leader in Gender-Selected Semen Research and Information You Can Trust! - By David C. Thorbahn, general manager, Select Sires Inc.
Delivering on a Promise
Need More Heifers? It’s Possible!
A Promise Made, A Promise Delivered
A Heifer Not Just By Chance!

™gender SELECTed Sires is a trademark of Select Sires Inc.


Select Sires Inc., 11740 U.S. 42 North, Plain City, Ohio 43064 / Phone: (614) 873-4683 Fax: (614) 873-5751