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.
As cattle markets show renewed strength, producers gathering at CattleCon are focused on protecting operations, managing risk, and positioning for opportunity in the year ahead.
February 04, 2026 01:41 PM
·
The Fort Worth Stock Show and Rodeo continues through Saturday, showcasing livestock, youth involvement, and agricultural talent, with the Junior Sale of Champions serving as the culmination of the 23-day event.
February 04, 2026 12:54 PM
·
Mexico has fallen behind by several hundred thousand acre-feet in required water deliveries to the United States, a shortfall that has had devastating consequences across the Rio Grande Valley.
February 04, 2026 12:23 PM
·
Modest rate relief may come late in 2026, but borrowing costs are likely to stay elevated.
February 04, 2026 11:23 AM
·
U.S. Senator Roger Marshall of Kansas discusses expected changes to the 45Z tax credit and what they could mean for agriculture and rural America.
February 04, 2026 11:13 AM
·
Purdue University Professor of Agricultural Economics Dr. Jim Mintert shares a closer look at farmer sentiment and the key issues shaping the agricultural economy in January.
February 04, 2026 10:53 AM
·
