Dairy cows produce more milk for heifers than for baby bulls, according to new research from Kansas State University and Harvard University.
Researchers studied lactation records for more than one million dairy cattle across the country.
Their findings contradicted evolutionary biology theories that predicted bias was in favor of sons. The cows actually produced more milk for their female offspring.
“Daughters seemed to have the most dramatic effect on the initial development of the mammary gland because the bias against sons was greatest in the first lactation,” said K-State Department of Animal Sciences and Industry associate professor Barry Bradford.
The study also found that the sex of the first baby might determine the amount of milk produced for the following children.
The results were available in the scientific journal PLOS One.
Lower freight costs helped sustain export demand amid a challenging pricing environment.
February 10, 2026 06:00 AM
·
Producers across the country spent the week balancing spring planning with tight margins and uneven moisture outlooks. Input purchasing stayed cautious, while marketing and cash-flow decisions remained front and center for many operations.
February 09, 2026 03:17 PM
·
Income support helps, but farm finances remain tight heading into 2026.
February 09, 2026 03:04 PM
·
Nationwide highlights expanded insurance options for cattle operations and their company initiatives to promote grain bin safety and support women in agriculture.
February 09, 2026 02:58 PM
·
Tyler Schuster is an ag industry advocate who mentors and supports the next generation, especially women finding their place in the cattle industry.
February 09, 2026 12:35 PM
·
NCBA Chief Counsel Mary-Thomas Hart breaks down CAFO permits, EPA enforcement, and what cattle producers need to know as rules continue to evolve.
February 09, 2026 12:21 PM
·
