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.
Prepare for tighter cash flow, delayed capital buys, and policy-driven risk management this fall.
October 08, 2025 12:12 PM
·
Delaware FarmHER Katie Evans turns “ugly” produce into delicious treats through her nationally recognized brand, The Frozen Farmer
October 07, 2025 03:12 PM
·
George Baird, with the American Society of Farm Managers and Rural Appraisers (ASFMRA), joins us with updates on how this year’s rice harvest is shaping up.
October 07, 2025 03:12 PM
·
Crop insurance remains a vital tool for managing climate-driven risk.
October 07, 2025 03:07 PM
·
Expect firm demand for dependable HRS and SW, steady movement in HRW, more sorting on SRW, and selective bids on durum until full milling results are released.
October 07, 2025 03:02 PM
·
Dr. Todd Davis, Chief Economist with the Indiana Farm Bureau, shares a snapshot of his state’s harvest conditions and insights from producers.
October 07, 2025 02:37 PM
·
