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DairyTalk 737: Heat Stress Before Breeding: Why Oocyte Damage Can Begin Weeks in Advance - by Helmut Demmelhuber
This podcast episode is based on a technical article examining how heat stress compromises dairy cow fertility long before pregnancy diagnosis can reveal a problem. The analysis identifies two critical biological windows: oocyte development during the weeks and months preceding insemination, and the highly vulnerable first days of embryonic development before the embryo develops a stronger capacity to respond to stress. These different time frames help explain why reproductive losses may persist even after temperatures improve or immediate cooling measures appear effective. Rather than…
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