Reproductive management in dairy cattle is central to farm profitability, but the methods used and the physical demands of repeated pregnancies have significant welfare implications.
Reproductive management creates welfare challenges through the physical demands of annual calving and the health consequences of high milk production. High-yielding cows directing enormous energy resources to milk production have compromised reproductive efficiency, driving hormonal intervention to maintain conception rates. Injection protocols for synchronization cause handling stress and local injection site reactions. The metabolic load of repeated annual pregnancies combined with high milk production contributes to the shortened productive lifespan of dairy cows - average culling at 2.5-3 lactations versus a natural lifespan of 20+ years. Extended lactation systems that reduce calving frequency improve welfare by reducing the physiological burden of annual pregnancy.